Opening ports using iptables

To open a port by using iptables you can use the iptables command, assume for example that you want to open port 25, you have to issue on the shell the following command iptables -I INPUT -p tcp –dport 25 -j ACCEPT where -I instruct to not add the rulle after the deny all rule […]

CentOS 5.5 How to export X11 Display

It was a messy to try to export the display to a remote host. Typically it is just matter to use command like xauth <hostname> and set the DISPLAY environment variable properly or better to¬† use ssh forwarding. On Putty and TeraTerm we need just to enable a check instead from a linux shell you […]