How to install Csf

Csf installation is very simple and quite straightforward. Login to the server as root, then navigate to the desired location where you wan't to download the installation file.

#cd /usr/local/src

Then download the installation package:

#wget http://www.configserver.com/free/csf.tgz

Now ontar the package using the blow command

#tar -xzf csf.tgz 

Now get into the directory csf

#cd csf 

Now run the below command to install

#sh install.sh

 Once the installation is done, you can do the configuration in

#/etc/csf/csf.conf

Once this is done  disable TESTING mode, lfd will not start while this is enabled. For this change the value to "0" from "1" in csf.conf file.

TESTING = "0"

Once this is done, restart the csf .

#csf -r 

DONE!!!! 

How to install SSL Certificate in a server running Lighttpd

For installing SSL Certificate for domain running in Lighttpd, follow the steps bellow. 

Login to the server and download / copy the certificate files.

Once this has been done, you need to concatenate the certificate and key file into a single pem file. For this follow the step below.

#cat yourdomain-name.key yourdomain-name.crt > yourdomain-name.pem

Now you need to edit lighttpd.conf file and add the following lines.

# vi /etc/lighttpd/lighttpd.conf

     var.confdir = "/etc/lighttpd"
     $SERVER["socket"] == "10.10.10.10:443" {
     ssl.engine = "enable"
     ssl.pemfile = var.confdir + "/yourdomain-name.pem"
     ssl.ca-file = var.confdir + "/your.crt"
     server.name = "your.domain.com"
     server.document-root = "/your/document/root/" }

Make sure that the var.confdir (/etc/lighttpd) is the location where you saved your certificate files. Also change the IP address (10.10.10.10) to your IP address.

Now restart Lighttpd.

#restart lighttpd

You are done. !!!!

Assign dedicated ip to a domain in Cpanel

Assigning dedicated ip to an account is simple. You just need to follow the steps below.


Home » IP Functions

Home » IP Functions » Change a Site’s IP Address

From here select the account for which the ip has to be changed. Once selected click "Change" button at the bottom.

Now select the ip from the list that you click on the drop down button, and click " Change ".

This will change the ip of the account. 

Enable TUN/TAP in OpenVZ

For installing TUN/TAP for a OpenVZ vps, you should first make sure that the module is enabled in the node.

For this you need to run the command bellow.

# lsmod | grep tun

 If the module is not installed, just install it by running

# modprobe tun

Now to enable the module to the vps, run the following commands. Replace Veid with your vps id

# vzctl set Veid --devnodes net/tun:rw --save

# vzctl set Veid --devices c:10:200:rw --save

# vzctl stop Veid 

# vzctl set Veid --capability net_admin:on --save

# vzctl start Veid

# vzctl exec Veid mkdir -p /dev/net

# vzctl exec Veid chmod 600 /dev/net/tun

Now TUN/TAP is enabled for the vps. To check this get into the vps.

# vzctl enter Veid

Now run the following command in the vps.

# cat /dev/net/tun

 The result of the above command should be

cat: /dev/net/tun: File descriptor in bad state

Change timezone in Xen VPS

The file /etc/localtime is the one which holds information of server’s timezone.

For changing the timezone you should point it to the correct zone file by creating a soft link.

From following commands below we are changing the current timezone to IST:

Firstly move the current localtime file as backup.

#mv /etc/localtime /etc/localtime.bak

Now from /usr/share/zoneinfo/ you can find the preferred timezone. Once you found the timezone file, crate a soft link   to  /etc/localtime. Eg: For IST

#ln -sf /usr/share/zoneinfo/Asia/Calcutta /etc/localtime

You are done!! You can find the timezone changed. But if you reboot the vps the settings will get reverted back. So once finishing the steps above, do the following. 

 Run following command

echo 1 > /proc/sys/xen/independent_wallclock

Now installed ntp in the vps.

# yum install ntp 

# chkconfig ntpd on

 Synchronize the system clock with 0.pool.ntp.org server:

# ntpdate pool.ntp.org

Start NTP

# /etc/init.d/ntpd start

Now edit /etc/rc.local with your favorite editor and put the following lines there.

# vi  /etc/rc.local

service ntpd stop

echo 1 > /proc/sys/xen/independent_wallclock

ntpdate pool.ntp.org

service ntpd start

You would now get correct timezone and correct time every time you reboot your Xen VPS.

Change timezone in Openvz VPS

The file /etc/localtime is the one which holds information of server’s timezone.

For changing the timezone you should point it to the correct zone file by creating a soft link.

From following commands below we are changing the current timezone to IST:

Firstly move the current localtime file as backup.

#mv /etc/localtime /etc/localtime.bak

Now from /usr/share/zoneinfo/ you can find the preferred timezone. Once you found the timezone file, crate a soft link   to  /etc/localtime. Eg: For IST

#ln -sf /usr/share/zoneinfo/Asia/Calcutta /etc/localtime

Once the link is created, reboot the vps. 

#reboot

You are done!! Now you can find your timezone.

How to setup custom nameservers in Kloxo

To setup custom nameservers in Kloxo, you have to register custom nameservers with your server IP address at your domain registrar.

After custom nameservers has been  registered in your domain registrar control panel, you can setup custom nameservers inside your Kloxo panel. For that you can follow the steps below. 

1. Login to Kloxo as " admin ".

2. From the home screen, click on the " DNS Templates " icon.

3. Now click the " Add DNS Template ".

4. Fill in the form.

5. In DNS Template Name field enter your prefered DNS template name (Any name).

6. From the dropdown lists choose your IP address for your Web and Mail services.

7. In "Primary DNS" and "Secondary DNS" enter your custom nameservers hostnames (The same you have registered in your domain registrar control panel).

8. Press " Add " button.

9. Then change DNS for your domain to you custom DNS servers at your domain registrar.

10. If all setup is done correctly, then it may take up to a 24-48 hours for DNS change to take effect.

How to Flush DNS

How to Flush DNS cache in Microsoft Windows

For this just to the following steps.

Start => Run => cmd

Now give the following command in the command prompt

c:\> ipconfig /flushdns 

You are Done!!


How to Flush DNS cache in a Linux Server

For this login to the server. And issue the following command.

root@amaziah [~]# /etc/init.d/nscd restart

                          OR

root@amaziah [~]# service nscd restart

                          OR

root@amaziah [~]# service nscd reload

This will flush DNS cache in Linux.

How to Install maldetect

For installing Maidetect in your server, login to your server.

Download the latest tar file available using wget .

#wget http://www.rfxn.com/downloads/maldetect-current.tar.gz

Extract the file using the the command below.

# tar -xzvf maldetect-current.tar.gz

Get into the directory  maldetect-*

# cd maldetect-1.4.2/

Now issue the following command, which will install maldetect in your server

# sh install.sh

Now for scanning a particular directory "eg: /home"  using maldetect, issue the below command

#maldet -a  /home

Install rkhunter

The following steps explains how to install rkhunter in your server.

Firstly login to your server as root. And navigate to the directory where you would download the file.

# cd /usr/local/src

Now download the source file using wget.

# wget http://nchc.dl.sourceforge.net/project/rkhunter/rkhunter/1.4.0/rkhunter-1.4.0.tar.gz

Now extract the file using the following comand.

# tar -zxvf rkhunter-1.4.0.tar.gz

And get into the directory rkhunter-*

# cd rkhunter-1.4.0

Now, the command below will install rkhunter in your server.

# ./installer.sh --install

Email alert on root ssh login

For setting up email alert on root login, firstly login to the server.

Then get into the directory /root

# cd /root

The using your favorite editor, edit the file ".bashrc"

# vi .bashrc

Go to the end of the file. And insert the following line.

echo 'ALERT - Root Shell Access (YourserverName) on:' `date` `who` | mail -s "Alert: Root Access from `who | cut -d'(' -f2 | cut -d')' -f1`" you@yourdomain.com

Replace the following in the line with your variables.

YourserverName = Server hostname or Server IP address
you@yourdomain.com = Your mail id where you would like to receive the alert.


You are DONE!! Now if you login to the server, you will be receiving email alert at you@yourdomain.com.

Enable/Disable ping in a server

To disable ping in the server, you can execute the following

root@amaziah [~]# echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all

Now, if you want to re-enable it,

root@amaziah [~]# echo "0" > /proc/sys/net/ipv4/icmp_echo_ignore_all

Now to disable it permanently, you can edit /etc/sysctl.conf

root@amaziah [~]#vi /etc/sysctl.conf

edit the following line

net.ipv4.icmp_echo_ignore_all = 0

and replace the "0" with "1" ie.

net.ipv4.icmp_echo_ignore_all = 1

 then save and close the file.