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Installing ClamAV antivirus tool on your server

In this post i will describe how to install ClamAV an antivirus tool on your linux OS server.

What is ClamAV:

ClamAV is an antivirus tools, which allows you to scan each file on you server, it provides fast scanning of all files including emails, attachments and uploaded files.

It provides the facility to scan those files that are being uploaded, a real time scanning can be achieved with it. It does scan for malicious scripts and for trojans.

You must have this tool installed on the server specially if you are web hosting provider.

Installation:

  • Login to your server through terminal or ssh with root privileges
  • Run the following commands:

# cd
# wget http://downloads.sourceforge.net/clamav/clamav-0.97.2.tar.gz
# tar -xvzf clamav-0.97.2.tar.gz
# cd clamav-0.97.2 #groupadd clamav
# useradd clamav -g clamav -c “Clam AntiVirus” -s /nonexistent .
# /configure
# make
# make install
# cd ..

  • And you are done, now can run your first scan by this command:

# clamscan -r
OR
# clamscan –remove Read More

Difference Between Onshore and Offshore servers

In this post i will describe major differences between onshore and offshore servers and will tell you which best and suitable for hosting business. So lets start…

Offshore traditionally refers to small island jurisdictions, thus not on any country’s shore. These jurisdictions have limited infrastructure which results in increased latency, decreased throughput, higher cost, and vulnerability to DDoS attacks.

The theory is that if you’re offshore you can host content that you could not host elsewhere. This is mostly only true with online gaming where licensing countries require locally hosted content.

A couple of other key points:

  • The only content that is specifically illegal to host in the U.S. is child pornography. Any other restrictions are set by the provider, not by law.
  • Netherlands and other EU countries are not “offshore
  • The main benefit to providing offshore hosting is the ability to sell the perceived concept that having content outside the U.S. makes you “safer.”

What is best for hosting business:

In my opinion offshore server is best for web hosting business where your client or your reseller’s clients may host some not acceptable contents in US and might be against to US laws, in this situation you might get your server got suspended due to violating TOS of onshore server. On the other hand, on offshore location your server will not be suspended or terminated as server provide will only send you legal notices to remove the contents and if you do not take any action your IP will get banned instead of server suspension which may later you can unblock by removing and informing the server provider.

So offshore server is best choice for web hosting business 🙂

Installing CSF to prevent DDos Attacks

In this post i will describe how to install CSF (Config Server Security and FireWall) on the linux based Operating system.

A short description of CSF :

CSF provides security improvements and protects your server from various attacks including DDOS. It provides better security as compared to others and the mostly hosting providers are using it to secure their server from hackers. I recommend you to install it on your server whether it is VPS of Dedicated box.

Installation:

  • Login to you server through terminal with root privileges.
  • Type following commands:

# cd
# rm -fv csf.tgz
# wget http://www.configserver.com/free/csf.tgz
# tar -xzf csf.tgz
# cd csf
# sh install.sh

  • it will take less than 5 minutes to be installed completely, afterward you must run the following command to ensure the required iptables modules are installed to function properly:

# perl /etc/csf/csftest.pl

  • And the report will be shown with the suggestions.
  • Now just navigate to the directory where you have installed CSF by executing following command:

# cd /etc/csf Read More

Start/Restart/Stop Apache2 web server on linux

Here are some short commands for linux OS you can use to execute start/stop and restart apache services. Commands must be executed from linux terminal/ssh in other words they all are ssh commands.

To Start Apache2 web server:

# /etc/init.d/apache2 start
OR
# /etc/init.d/httpd start
OR
# service apache2 start
OR
# service httpd start

To Stop Apache2 web server:

# /etc/init.d/apache2 stop
OR
# /etc/init.d/httpd stop
OR Read More

DMCA Notice UDP Outgoing flood resolution

In this post i will discuss about the DMCA notice that i have received some times ago. In that notice they have mentioned my server is being used to DDos to some other server via UDP ports. In other words my server was being used to launch DDos Attack on other server via UDP. i had search on google but did not able to find any proper solution to this problem and my bandwidth usage suddenly increased to 2TB+ in a day that was my monthly bandwidth usage before the notification. So i started searching to solve the issue and after 1 month i got a solution that is to check the each account for malicious scripts.

cPanel does not record outgoing traffic on UDP ports for the accounts, the only way to check the outbound traffic is bandmin that is available within cPanel.

You can see all traffic whether it is inbound or outbound from bandmin, to do so go to your browser and type : http://yourdomain.com/bandwidth at this point you will be asked to provide username and password for bandmin that can be changed from cPanel/WHM. Just find the option Bandmin Password Under Service Configuration in you WHM panel’s left side. Change the password and then use it to login to your bandmin stats from http://www.yourdomain.com/bandwidth Read More