[CentOS] Multiple FreeNX servers and SSH ports
ned at unixmail.co.uk
Sun Mar 21 17:19:55 UTC 2010
Les Mikesell wrote:
> Niki Kovacs wrote:
>> 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 ?
>> 2) How do I configure these different ports ? By that, I mean : how do I
>> tell SSH to use them instead of port 22 ?
> You don't really need to change the ports on the hosts. Just configure the
> router to accept different ports on the internet side and redirect to port 22 at
> the different IP addresses on the inside. Then you only have to change the
> client settings for access from outside. I'd move both of them away from port
> 22 on the outside, though - you'll avoid a lot of password guessing attempts
> that will happen otherwise.
Not all home/consumer routers will allow redirection to another port -
some only allow packet forwarding to the *same* port at another IP address.
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