[Discuss] S/W in Linux to change its default ports

[J.Bakshi]

Hi all,

I wounder if there is any S/W in Linux to change its default ports.
Like SSH is using port-22 and http using port-80. Now if I want to run SSH on 
say port 2890 and http on port 1240; how to do that ? any GUI to change these 
default ports ?

thanks