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Installing HAProxy For Load Blancing And Protecting Apache From DDos

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HAProxy For Load Blancing And Protecting Apache 
HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers quite a number of the world's most visited ones. Over the years it has become the de-facto standard opensource load balancer, is now shipped with most mainstream Linux distributions, and is often deployed by default in cloud platforms.  
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Its mode of operation makes its integration into existing architectures very easy and riskless, while still offering the possibility not to expose fragile web servers to the net, such as below : 
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<a href="http://www.haproxy.org/img/haproxy-pmode.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://www.haproxy.org/img/haproxy-pmode.png" /></a></div>
 
version 1.5 : the most featureful version, supports SSL, IPv6, keep-alive, DDoS protection, etc... 
version 1.4 : the most stable version for people who don't need SSL. Still provides client-side keep-alive 
 
version 1.3 : the old stable version for companies who cannot upgrade for internal policy reasons. <a href="http://www.haproxy.org/#desc" target="_blank">More Info Here</a> 
INSTALLATION 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; color: white; font-family: monospace, serif; font-size: 14px; line-height: 19.2px; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">wget http://haproxy.1wt.eu/download/1.5/src/devel/haproxy-1.5-dev7.tar.gz
tar xvfz haproxy-1.5-dev7.tar.gz
$ cd haproxy-1.5-dev7</pre>
Now we have to compile the installation file, we are taking example of centos. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; color: white; font-family: monospace, serif; font-size: 14px; line-height: 19.2px; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">make install</pre>
Now make a new directory and copy haproxy configuration file there 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; color: white; font-family: monospace, serif; font-size: 14px; line-height: 19.2px; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">mkdir /etc/haproxy
cd /etc/haproxy
vi haproxy.cfg</pre>
change the ip address below and copy it to haproxy.cfg 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">global
daemon
maxconn 20000 # count about 1 GB per 20000 connections
pidfile /var/run/haproxy.pid
stats socket /var/run/haproxy.stat mode 600

defaults
mode http
maxconn 19500        # Should be slightly smaller than global.maxconn.
timeout client 60s   # Client and server timeout must match the longest
timeout server 60s   # time we may wait for a response from the server.
timeout queue  60s   # Don't queue requests too long if saturated.
timeout connect 4s   # There's no reason to change this one.
timeout http-request 5s    # A complete request may never take that long.
# Uncomment the following one to protect against nkiller2. But warning!
# some slow clients might sometimes receive truncated data if last
# segment is lost and never retransmitted :
# option nolinger
option http-server-close
option abortonclose
balance roundrobin
option forwardfor    # set the client's IP in X-Forwarded-For.
option tcp-smart-accept
option tcp-smart-connect
retries 2

frontend public
bind 192.168.1.1:80
bind 192.168.1.2:80
bind 192.168.1.3:80
bind 192.168.1.4:80

# table used to store behaviour of source IPs
stick-table type ip size 200k expire 5m store gpc0,conn_rate(10s)

# IPs that have gpc0 > 0 are blocked until the go away for at least 5 minutes
acl source_is_abuser src_get_gpc0 gt 0
tcp-request connection reject if source_is_abuser

# connection rate abuses get blocked
acl conn_rate_abuse  sc1_conn_rate gt 30
acl mark_as_abuser   sc1_inc_gpc0  gt 0
tcp-request connection track-sc1 src
tcp-request connection reject if conn_rate_abuse mark_as_abuser

default_backend apache

backend apache
# set the maxconn parameter below to match Apache's MaxClients minus
# one or two connections so that you can still directly connect to it.
stats uri /haproxy?stats
server srv 0.0.0.0:8181 maxconn 254

# Enable the stats page on a dedicated port (8811). Monitoring request errors
# on the frontend will tell us how many potential attacks were blocked.
listen stats
# Uncomment "disabled" below to disable the stats page :
# disabled
bind :8811
stats uri /
</pre>
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In the above file replace 192.168.1.1 to 192.168.1.4 with your server ip address.</div>
Change your Apache port to 8181 as in configuration file we are using that server srv 0.0.0.0:8181 maxconn 254. 
In WHM goto Tweak Settings and find Apache non-SSL IP/port and change it to 8181. 
Restart apache 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">/etc/init.d/apache2 restart</pre>
Start haproxy 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">haproxy -f /etc/haproxy/haproxy.cfg</pre>
Now we have to check if its working. Go to your stats page to see 
serverip:8811 
 
 
Replace serverip with your server ip used in configuration file and you will see full result generated by haproxy 
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Installing HAProxy For Load Blancing And Protecting Apache From DDos

HAProxy For Load Blancing And Protecting Apache HAProxy is a free, very fast and reliable solution offering high availability, load balanc...

How to Use NODEQUERY to monitor server performance

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Using NODEQUERY to monitor server performance 
NodeQuery provides a lightweight and easy to use linux server monitoring service. Get alerts and actively monitor the performance of your servers. 
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Anyway, I really like the simplicity of NodeQuery’s user interface and the way its display the data. 
How to setup NodeQuery monitoring agent on your server? 
 
SETUP USER AGENT 
 
Step 1 – Of course, you have to firstly signup for an account at NodeQuery website. <a href="https://nodequery.com/signup" target="_blank">Visit this link to go to their signup page</a>. 
Step 2 – Choose Beta Account, and then fill in your Full Name, Email Address and Password. 
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Just click on the blue Sign Up button. You'll be then asked to enter a challenge code. Just enter it, tick mark the "I agree to ToS," and click the Confirm button. 
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Then Goto your mail box and active the registration link after that login your account you will see the bellow dashboard.. 
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Step 5 – Let's add your first server to monitor. Click on the New Server button / link. 
Step 6 – Now define your server name. It is strongly recommended to use your valid FQDN. 
You have to also decide how the system will send you alert when your server goes down. 
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Setup minimum threshold of when NodePing should send you alert. There are three major sections you can setup the threshold for system resource usage alert : System load, RAM usage, and Disk usage. 
 
Step 7 -After that You'll be given a command to install monitoring agent on your server. Just copy that command : 
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Step 8 - Open up putty and login to your server as a user with sudo privilege. Issue the coped command there : 
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Step 9 – Go back to NodeQuery dashboard and click on the Manage Servers button.  You’ll then notice your newly added server is there. However, the status would be Awaiting Data It's need some to for syncing.. 
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Just wait for approximately 3 minutes and refresh that page. You’ll then see a page similar to this one : 
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Step 10 – You can then browse around to see detailed server performance stats monitored by NodeQuery : 
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Network usage 
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Network latency 
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Average Load (CPU and Disk I/O) 
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RAM Usage Stats 
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Disk Usage 
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How to Use NODEQUERY to monitor server performance

Using NODEQUERY to monitor server performance NodeQuery provides a lightweight and easy to use linux server monitoring service. Get alerts...

How to Configure Postfix to use Gmail as a Mail Relay

<div align="CENTER" style="line-height: 0.18in;">
Configure
Postfix to use Gmail as a Mail Relay</div>
<div align="CENTER">
 
</div>
<div style="line-height: 0.18in;">
If
you have a Gmail account, you can configure your MTA to relay
outgoing mail through Gmail. This gives you the benefit of Gmail's
reliability and robust infrastructure, and provides you with a simple
means of sending email from the command line.</div>
<div style="line-height: 0.18in;">
In
this tutorial, we will use <a href="http://www.hackthesec.co.in/search/label/postfix">Postfix</a>
as our MTA. Postfix is a free, open-source, actively maintained, and
highly secure <a href="http://www.hackthesec.co.in/search/label/Mail_Server">mail
</a>transfer agent.</div>
<div style="line-height: 0.18in;">
At
each step, we'll cover instructions specific to the following
operating systems:.</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrMn_6bemuFMImdt3rnNMGi-Y-7CP0d4xncRey8PVK-Od8lJe-z2bdUGz-ApNY6AnTCa59mUXaE2I_Qr2KPa4KLBnh5VozputsikER_dKtSZHpQ35z-VbHznGZViTZNcQqH2XVnGaZ2fpW/s1600/Gmail-Relay-www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrMn_6bemuFMImdt3rnNMGi-Y-7CP0d4xncRey8PVK-Od8lJe-z2bdUGz-ApNY6AnTCa59mUXaE2I_Qr2KPa4KLBnh5VozputsikER_dKtSZHpQ35z-VbHznGZViTZNcQqH2XVnGaZ2fpW/s1600/Gmail-Relay-www.hackthesec.co.in.png" /></a></div>
<div style="line-height: 0.18in;">
 </div>
<div align="CENTER">
</div>
<ul>
<li><div align="LEFT" style="line-height: 0.18in; margin-bottom: 0in;">
<a href="http://www.hackthesec.co.in/search/label/Debian">Debian</a>
 8 
 </div>
</li>
<li><div align="LEFT" style="line-height: 0.18in; margin-bottom: 0in;">
<a href="http://www.hackthesec.co.in/search/label/ubuntu-15.10">Ubuntu
 15.10</a> 
 </div>
</li>
<li><div align="LEFT" style="line-height: 0.18in; margin-bottom: 0in;">
<a href="http://www.hackthesec.co.in/search/label/centos7">CentOS
 </a>7 
 </div>
</li>
<li><div align="LEFT" style="line-height: 0.18in; margin-bottom: 0in;">
<a href="http://www.hackthesec.co.in/search/label/SUSE">OpenSUSE</a>
 13.2 
 </div>
</li>
<li><div align="LEFT" style="line-height: 0.18in; margin-bottom: 0in;">
Arch
 Linux 2016.02.01 
 </div>
</li>
<li><div align="LEFT" style="line-height: 0.18in;">
FreeBSD
 10.2 
 </div>
</li>
</ul>

<div style="line-height: 0.18in;">
We
will also install mailutils/mailx so that we can send a test email.
Where necessary, we will install supplemental SASL libraries.</div>
<h2 class="western" style="background: #fdfdfd; line-height: 110%; margin-bottom: 0.1in; margin-top: 0.22in;">
Ubuntu/Debian:-</h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 142%; margin-bottom: 0.1in; padding: 0in;"><code class="western"># apt-get update && apt-get install postfix mailutils</code></pre>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">When
prompted for "General type of mail configuration,"
choose </code><code class="western">Internet
Site</code><code class="western">.</code></div>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">When
prompted for a "Mail name," choose a hostname to be used in
<a href="http://www.hackthesec.co.in/search/label/mail">mail</a>
headers as the origin of your emails. A fully-qualified domain name
is preferred, but using your machine's simple hostname is OK.
Regardless of what you enter here, your return address will appear to
recipients as your Gmail address.</code></div>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">You
may be prompted to set the "Root and postmaster mail recipient."
Enter </code><code class="western">root</code><code class="western">,
or another user who should receive mail subsystem notifications.</code></div>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">For
any other prompts, you can choose the default values.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Fedora</code><code class="western"></code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in;"><code class="western"># </code><code class="western">dnf update && dnf install postfix mailx</code></pre>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">CentOS</code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in;"><code class="western"># </code><code class="western">yum update && yum install postfix mailx cyrus-sasl cyrus-sasl-plain</code></pre>
<h2 class="western" style="background: rgb(253, 253, 253) none repeat scroll 0% 0%; border: medium none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">OpenSUSE</code><code class="western"></code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in;"><code class="western"># </code><code class="western">zypper update && zypper install postfix mailx cyrus-sasl</code></pre>
<h2 class="western" style="background: rgb(253, 253, 253) none repeat scroll 0% 0%; border: medium none; line-height: 110%; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Arch
Linux</code><code class="western"></code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in;"><code class="western"># </code><code class="western">pacman -Sy postfix mailutils</code></pre>
<h2 class="western" style="background: rgb(253, 253, 253) none repeat scroll 0% 0%; border: medium none; line-height: 110%; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">FreeBSD</code></h2>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Compile
<a href="http://www.hackthesec.co.in/search/label/postfix">Postfix
</a>from the ports collection to incorporate support for SASL:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in;"><code class="western"># </code><code class="western">portsnap fetch extract update</code>
<code class="western"># </code><code class="western">cd /usr/ports/mail/postfix</code>
<code class="western"># </code><code class="western">make config</code></pre>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">In
the configuration dialogs, select </code><code class="western">SASL
support</code><code class="western">.
All other options can remain the same. Then:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in;"><code class="western"># </code><code class="western">make install clean</code></pre>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Mailx
can be installed from the binary package:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in;"><code class="western"># </code><code class="western">pkg install mailx</code></pre>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
 
<code class="western">Configure Gmail Authentication</code></h2>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Create
or modify a password file which will be used by Postfix to establish
authentication with Gmail. In the authentication information below,
replace </code><code class="western">username</code><code class="western"> with
your Gmail username and </code><code class="western">password</code><code class="western"> with
your Gmail password. If you are using a custom Gmail Apps domain
name, you may replace </code><code class="western">gmail.com</code><code class="western"> with
your Google Apps domain. The password file will reside in the
<a href="http://www.hackthesec.co.in/search/label/postfix">Postfix</a>
configuration directory. The file can be named whatever you like, but
the recommended filename is</code><code class="western">sasl_passwd</code><code class="western">.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Debian,
Ubuntu, Fedora, CentOS, OpenSUSE, Arch Linux:</code></h2>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Postfix
configuration files reside in the directory </code><code class="western">/etc/postfix</code><code class="western">.
Create or edit the password file:</code></div>
 
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.35in; margin-bottom: 0.1in; padding: 0in; text-align: left;"><code class="western"># </code><code class="western">vi /etc/postfix/sasl_passwd</code></pre>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Add
the line:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">[smtp.gmail.com]:587   username@gmail.com:password</code></pre>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Save
and close the file. Your Gmail password is stored as plaintext, so
make the file accessible only by root:</code></div>
<pre class="western" style="background: #f5f5f5; border: 1px solid #cccccc; line-height: 0.19in; margin-bottom: 0.1in; padding: 0.09in;"><code class="western"># chmod 600 /etc/postfix/sasl_passwd</code></pre>
<h2 class="western" style="background: rgb(253, 253, 253) none repeat scroll 0% 0%; border: medium none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">FreeBSD:</code></h2>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Postfix
configuration files reside in the directory </code><code class="western">/usr/local/etc/postfix</code><code class="western">.
Create or edit the password file:</code></div>
<pre class="western" style="background: #f5f5f5; border: 1px solid #cccccc; line-height: 0.19in; margin-bottom: 0.1in; padding: 0.09in;"><code class="western"># vi /usr/local/etc/postfix/sasl_passwd</code></pre>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Add
the line:</code></div>
<pre class="western" style="background: #f5f5f5; border: 1px solid #cccccc; line-height: 0.19in; margin-bottom: 0.1in; padding: 0.09in;"><code class="western">[smtp.gmail.com]:587 username@gmail.com:password</code></pre>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">Save
and close the file. Make it accessible only by root:</code></div>
<pre class="western" style="background: #f5f5f5; border: 1px solid #cccccc; line-height: 0.19in; margin-bottom: 0.1in; padding: 0.09in;"><code class="western">#chmod 600 /usr/local/etc/postfix/sasl_passwd</code></pre>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Configure
Postfix</code></h2>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western">There
are six parameters which must be set in the Postfix configuration
file </code><code class="western">main.cf</code><code class="western">.
The parameters are:</code></div>
<div style="border: none; line-height: 0.18in; padding: 0in;">
<code class="western"> </code><code class="western">relayhost</code><code class="western">,
which specifies the mail relay host and port number. The host name
will be enclosed in brackets to specify that no MX lookup is
required.</code><code class="western">smtp_use_tls</code><code class="western">,
which enables (or disables) transport layer
security.</code><code class="western">smtp_sasl_auth_enable</code><code class="western">,
which enables (or disables) SASL
authentication.</code><code class="western">smtp_sasl_security_options</code><code class="western">,
which in the following configuration will be set to empty, to ensure
that no Gmail-incompatible security options are
used. smtp_sasl_password_maps, which specifies the password file
to use. This file will be compiled and hashed by </code><code class="western">postmap</code><code class="western"> in
a later step.</code><code class="western">smtp_tls_CAfile</code><code class="western">,
which specifies the list of certificate authorities to use when
verifying server identity.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Debian,
Ubuntu, Arch Linux:</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">Edit
the main Postfix configuration file:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">vi /etc/postfix/main.cf</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Add
or modify the following values:</code></div>
<pre class="western" style="background: rgb(245, 245, 245) none repeat scroll 0% 0%; border: medium none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">relayhost = [smtp.gmail.com]:587</code>
<code class="western">smtp_use_tls = yes</code>
<code class="western">smtp_sasl_auth_enable = yes</code>
<code class="western">smtp_sasl_security_options =</code>
<code class="western">smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd</code>
<code class="western">smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Save
and close the file.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Fedora,
CentOS:</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">Edit
the main Postfix configuration file:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#vi /etc/postfix/main.cf</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Add
or modify the following values:</code></div>
<pre class="western" style="background: rgb(245, 245, 245) none repeat scroll 0% 0%; border: medium none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">relayhost = [smtp.gmail.com]:587</code>
<code class="western">smtp_use_tls = yes</code>
<code class="western">smtp_sasl_auth_enable = yes</code>
<code class="western">smtp_sasl_security_options =</code>
<code class="western">smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd</code>
<code class="western">smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Save
and close the file.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">OpenSUSE:</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">Edit
the main Postfix configuration file:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#vi /etc/postfix/main.cf</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Add
or modify the following values:</code></div>

<pre class="western" style="background: rgb(245, 245, 245) none repeat scroll 0% 0%; border: medium none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">relayhost = [smtp.gmail.com]:587</code>
<code class="western">smtp_use_tls = yes</code>
<code class="western">smtp_sasl_auth_enable = yes</code>
<code class="western">smtp_sasl_security_options =</code>
<code class="western">smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd</code>
<code class="western">smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Save
and close the file.</code></div>
<div style="border: none; padding: 0in;">
 </div>
<div style="border: none; padding: 0in;">
<code class="western">OpenSUSE
also requires that the Postfix master process configuration file
master.cf be modified. Open it for editing:</code></div>
<div style="border: none; padding: 0in;">
 
</div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">vi /etc/postfix/master.cf</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Locate
the line which reads:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#tlsmgr unix - - n 1000? 1 tlsmg</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Uncomment
it, so it reads:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">tlsmgr unix - - n 1000? 1 tlsmg</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Save
and close the file.</code></div>
<h2 class="western" style="background: rgb(253, 253, 253) none repeat scroll 0% 0%; border: medium none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">FreeBSD:</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">Edit
the main Postfix configuration file:</code></div>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">vi /usr/local/etc/postfix/main.cf</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Add or modify
the following values:</code></div>
<pre class="western" style="background: rgb(245, 245, 245) none repeat scroll 0% 0%; border: medium none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">relayhost = [smtp.gmail.com]:587</code>
<code class="western">smtp_use_tls = yes</code>
<code class="western">smtp_sasl_auth_enable = yes</code>
<code class="western">smtp_sasl_security_options =</code>
<code class="western">smtp_sasl_password_maps = hash:/usr/local/etc/postfix/sasl_passwd</code>
<code class="western">smtp_tls_CAfile = /etc/mail/certs/cacert.pem</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Save and
close the file.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Process
Password File</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">Use
postmap to compile and hash the contents of sasl_passwd. The results
will be stored in your Postfix configuration directory in the file
sasl_passwd.db.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Debian,
Ubuntu, Fedora, CentOS, OpenSUSE, Arch Linux:</code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">postmap /etc/postfix/sasl_passwd</code></pre>
<h2 class="western" style="background: rgb(253, 253, 253) none repeat scroll 0% 0%; border: medium none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">FreeBSD</code><code class="western"></code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">postmap /usr/local/etc/postfix/sasl_passwd</code></pre>
<h2 align="CENTER" class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Restart
Postfix</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">Restart
the Postfix service, putting your changes into effect.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Debian,
Ubuntu, Fedora, CentOS, OpenSUSE, Arch Linux:</code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">systemctl restart postfix.service</code></pre>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">FreeBSD:</code></h2>
<div style="border: none; line-height: 0.27in; padding: 0in;">
<code class="western">To
start the Postfix service for this session only:</code></div>
 
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">service postfix onestart</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">To
start Postfix automatically when the system initializes, open
</code><code class="western">/etc/rc.conf</code><code class="western">
for editing:</code></div>
 
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">vi /etc/rc.conf</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Add
the line:</code></div>

<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">postfix_enable=YES</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Save
and close the file. You may then run:</code></div>
 
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">#</code><code class="western">service postfix start</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">To
start Postfix.</code></div>
<h2 align="CENTER" class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Enable
"Less Secure Apps" In Gmail</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">By
default, only the most secure sign-ins, such as logging in to Gmail
on the web, are allowed for your Gmail account. To permit relay
requests, log in to your Gmail account and turn on Allow less secure
apps.</code></div>
<div style="border: none; padding: 0in;">
<code class="western">For
more information, review the Google Support document "<a href="https://support.google.com/accounts/answer/6010255">Allowing
less secure apps to access your account</a>."</code></div>
<h2 align="LEFT" class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Send
A Test Email</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">Test
your new configuration by sending an email using the <a href="http://www.hackthesec.co.in/search/label/mail">mail
</a>command. Run:</code></div>

<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">mail -s "Subject Here" recipient@domain.com < textfile</code></pre>
<div style="border: none; padding: 0in;">
<code class="western">Where
textfile is the name of a file containing the text to be sent.</code></div>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Troubleshooting(Through
Log)</code></h2>
<div style="border: none; padding: 0in;">
<code class="western">If
it's not working, check the logs for any Postfix errors:</code></div>
<h2 class="western" style="background: rgb(253, 253, 253) none repeat scroll 0% 0%; border: medium none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Debian:</code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">less /var/log/mail.log</code></pre>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">Ubuntu,
Fedora, CentOS, OpenSUSE, Arch Linux:</code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">journalctl</code></pre>
<h2 class="western" style="background: #fdfdfd; border: none; line-height: 0.27in; margin-bottom: 0.1in; margin-top: 0.22in; padding: 0in;">
<code class="western">FreeBSD:</code></h2>
<pre class="western" style="background: #f5f5f5; border: none; line-height: 0.19in; margin-bottom: 0.1in; padding: 0in;"><code class="western">less /var/log/maillog</code></pre>
<div style="border: none; padding: 0in;">
 
</div>
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How to Configure Postfix to use Gmail as a Mail Relay

Configure Postfix to use Gmail as a Mail Relay If you have a Gmail account, you can configure your MTA to relay outgoing mail throug...

How to Temporarily Disable Foreign Key Checks in MySQL

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<h2 class="title single-title title20" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 28px; line-height: 38px; margin: 0px 0px 5px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
Temporarily Disable Foreign Key Checks in MySQL</h2>
<div>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
You must have faced the foreign key constrains issues many times while working with <a href="http://www.hackthesec.co.in/search/label/Mysql" target="_blank">MySQL database</a>. Generally this issue occurred during delete, insert records, backup and restore database and drop database and drop tables. In this situation its hard to complete task. <a href="http://www.hackthesec.co.in/search/label/Mysql" target="_blank">MySQL </a>provides an option to disable foreign key checks during any operation on tables or databases. You can disable check and complete your task without any issues.</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjuoxi5s0F8G1O0EBBaQZsBkS53hGtJLk_5eq5KH15vOG2iLfA9nuLja5cUU2fWhS1X4g5P4ZlYYQqXwgEsl-yiFo4igoYjJqXmPJwPtqi0z2OfxgfDGLmW_NcgzWNb-Bd7hqB52-V5rAxI/s1600/mysq-linux-www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="233" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjuoxi5s0F8G1O0EBBaQZsBkS53hGtJLk_5eq5KH15vOG2iLfA9nuLja5cUU2fWhS1X4g5P4ZlYYQqXwgEsl-yiFo4igoYjJqXmPJwPtqi0z2OfxgfDGLmW_NcgzWNb-Bd7hqB52-V5rAxI/s320/mysq-linux-www.hackthesec.co.in.jpg" width="320" /></a></div>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
 </div>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
This article will help you to how to enable or disable foreign key check in MySQL. Ever you faced foreign key error, Disable foreign key checks, do you work and enable it again.</div>
<h3 class="heading2" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 20px; font-weight: bolder; line-height: 30px; margin: 0px 0px 8px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
Disable Foreign Key Checks</h3>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">SET <orange>FOREIGN_KEY_CHECKS</orange>=<orange>0</orange>;
</pre>
<h3 class="heading2" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 20px; font-weight: bolder; line-height: 30px; margin: 0px 0px 8px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
Enable Foreign Key Checks</h3>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">SET <orange>FOREIGN_KEY_CHECKS</orange>=<orange>1</orange>;
</pre>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
Remember that, do not forgot to re-enable foreign key checks again after doing your work.</div>
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How to Temporarily Disable Foreign Key Checks in MySQL

Temporarily Disable Foreign Key Checks in MySQL You must have faced the foreign key constrains issues many times while working with MyS...

How to Install VirtualBox on OpenSUSE 13.1 & 13.2

<div dir="ltr" style="text-align: left;" trbidi="on">
<h1 class="post-title" style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 38px; font-stretch: inherit; font-weight: 400; letter-spacing: -1px; line-height: 1.3em; margin: 0px 0px 10px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
VirtualBox on OpenSUSE 13.1 & 13.2</h1>
<div>
<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; text-align: justify; vertical-align: baseline;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjWF4doyMGSKTabq9yA-gyr_x3SEcBwcWRJr4csb5HrHrvAoau1A8y-vNO5HTTjq1KKPXPeSzW9g5GdLcka_0g0yX0FIdYnnAZuLHrB6OBQa4vXieA_w6qlQkM5P_JzsxxG8sn9J5ir494v/s1600/vbox_www.hackthesec.co.in.png" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjWF4doyMGSKTabq9yA-gyr_x3SEcBwcWRJr4csb5HrHrvAoau1A8y-vNO5HTTjq1KKPXPeSzW9g5GdLcka_0g0yX0FIdYnnAZuLHrB6OBQa4vXieA_w6qlQkM5P_JzsxxG8sn9J5ir494v/s1600/vbox_www.hackthesec.co.in.png" /></a>VirtualBox is the virtualization software used at desktop level in linux like operating system .It allows us to install and run multiple Virtual Machines ( VM) at the same time. In this article we will install VirtualBox-4.3 on OpenSUSE 13.1 / 13.2.</div>
<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; text-align: justify; vertical-align: baseline;">
 </div>
<h5 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 20px; font-stretch: inherit; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
Step:1 Enable VirtualBox Repository</h5>
<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Open the terminal and enable the virtualbox repository because its packages are not available in the default opensuse repository</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;">linux-hackthesec:~ # cd /etc/zypp/repos.d/
linux-hackthesec:/etc/zypp/repos.d # wget http://download.virtualbox.org/virtualbox/rpm/opensuse/12.3/virtualbox.repo</pre>
<h5 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 20px; font-stretch: inherit; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
Step:2 Refresh the repository using below Command</h5>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;">linux-hackthesec:~ # zypper refresh</pre>
<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Before starting installation , please make sure following packages are install , if not then use the below command :</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;">linux-hackthesec:~ # zypper install gcc make automake autoconf kernel-source kernel-syms</pre>
<h5 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 20px; font-stretch: inherit; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
Step:3 Install Virtualbox-4.3 using below zypper command</h5>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;">linux-hackthesec:~ # zypper install VirtualBox-4.3</pre>
<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Apart from the Zypper Command We can also install Virtualbox package using Yast2 , example is shown below :</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;">linux-hackthesec:~ # yast2</pre>
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<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Select VirtualBox-4.3 and mark for installation.</div>
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<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Click on Apply</div>
<h5 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 20px; font-stretch: inherit; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
Step:4 Now Access the VirtualBox</h5>
</div>
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<div>
<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Click on the Virtualbox Icon.</div>
</div>
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 </div>
<div>
<div style="background-color: white; border: 0px; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Troubleshooting <span style="border: 0px; color: #333399; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">: In my case when i started Virtualbox, i was getting below error message :</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNruuYHeViGcFCr7wskoj4VZedz-Hi8j_7hHY8BMJPNw9AtOnYwS7lobXChdjsmx54IfhLtRn65uhKHpUhx2spHmBE3tylduu9Z-XyuWE4fHeEpmAs1uxhyesZcSmjdrBATxrAFKA1671Y/s1600/virtualbox-error_www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="128" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNruuYHeViGcFCr7wskoj4VZedz-Hi8j_7hHY8BMJPNw9AtOnYwS7lobXChdjsmx54IfhLtRn65uhKHpUhx2spHmBE3tylduu9Z-XyuWE4fHeEpmAs1uxhyesZcSmjdrBATxrAFKA1671Y/s640/virtualbox-error_www.hackthesec.co.in.jpg" width="640" /></a></div>
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To resolve this problem i have upgraded my Current Kernel version and then execute below command :</div>
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<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;">linux-hackthesec:~ # /etc/init.d/vboxdrv setup
Stopping VirtualBox kernel modules done
Recompiling VirtualBox kernel modules done
Starting VirtualBox kernel modules done
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<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;">Follow Us And Support Us
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How to Install VirtualBox on OpenSUSE 13.1 & 13.2

VirtualBox on OpenSUSE 13.1 & 13.2 VirtualBox is the virtualization software used at desktop level in linux like operating system ....