Records Of IT Support Resolutions

Great backup utility

IT.Findings — Tue, 31 Jan 2012 14:30:14 +0000

http://www.crashplan.com/consumer/crashplan.html

Filed under: Uncategorized

Allow only specific IP to SSH to Linux server

IT.Findings — Wed, 11 Jan 2012 15:05:27 +0000

To allow only specific IP to ssh to your linux server add the entry below into your firewall config file. Usually, the firewall config file is found in /etc/sysconfig/iptables:

-A INPUT -s x.x.x.x/x -p tcp -m state –state NEW -m tcp –dport 22 -j ACCEPT

x.x.x.x = your originating ssh communcation and/or the ONLY server you want to allow to SSH to your linux system
NOTE: the /x after x.x.x.x is the subnet number. so if your subnet is 255.255.254.0; then entry above should read x.x.x.x/23

Filed under: Linux

To install a GU…

IT.Findings — Wed, 11 Jan 2012 14:39:08 +0000

If you have not already done so, install the X Window System and a graphical desktop environment. For example, to install the KDE desktop environment, use this command:

yum groupinstall “X Window System” Desktop

To install the KDE desktop environment, use:

yum groupinstall “X Window System” “KDE Desktop”

This step may take some time as your Red Hat Enterprise Linux system downloads and installs additional software. You may be asked to provide the installation media depending on your original installation source.
Run the following command to edit the /etc/inittab file:
vi /etc/inittab
Press the I key to enter insert mode.
Find the line that includes the text initdefault. Change the numeral 3 to 5.
Type :wq and press the Enter key to save the file and exit the vi text editor.
Reboot the system using the reboot command. Your system will restart and present a graphical login.

Filed under: Linux

Add range of ports in linux

IT.Findings — Wed, 16 Nov 2011 16:04:20 +0000

To add a range of ports to accept from a specific server open iptables and enter the command below. Usually the iptables file is found in /etc/sysconfig/iptables. Replace media_server_ip with the IP of the server you want to accept the range of ports from:

-A RH-Firewall-1-INPUT -m tcp -p tcp -s media_server_ip –-dport 10000:10200 -j ACCEPT

Filed under: Linux