ASKER
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I wasn't aware that one shouldn't use less than 1024 as the port number. I have 43 servers running, all using 112 as the port for SSH and all running perfectly well. The only difference between this new server and all the others is that the others are all running with runlevel 3 and this one is running runlevel 5 (the Gnome interface that comes with CentOS).
I'll try changing the port to 1026 and see what happens, then I'll get back to you.
Thanks for the response - much appreciated.
Cheers
Chris