[CentOS] Multiple FreeNX servers and SSH ports

Ned Slider ned at unixmail.co.uk
Sun Mar 21 16:04:06 UTC 2010


Niki Kovacs wrote:
> Hi,
> 
> I've setup a small LAN of two desktops running CentOS 5 in a medical 
> office. Both are connected to the Internet via a small modem/router.
> 
> Recently I played around with FreeNX on my own desktop, and I'd like to 
> install it on these two computers. On my PC, I just redirected port 22 
> in the router, so SSH (and thus FreeNX) requests from the outside get 
> redirected to my desktop PC. (And yes, I have a strong password :oD)
> 
> I'd like to handle the two PCs from the medical office remotely with 
> FreeNX. I figured that the best way to distinguish them would be to 
> assign a different port for SSH to each of them, and then redirect each 
> of the ports respectively.
> 
> 1) How do I choose different port numbers for SSH ? Any conventions or 
> caveats for this ?
> 

Choose a random unused high port number (above 1023)

http://www.iana.org/assignments/port-numbers.

> 2) How do I configure these different ports ? By that, I mean : how do I 
> tell SSH to use them instead of port 22 ?
> 

http://wiki.centos.org/HowTos/Network/SecuringSSH#head-3579222198adaf43a3ecbdc438ebce74da40d8ec



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