problems with ssh

When I try to log in to my machine at home (from work) it fails. Checking the SuSEfirewall log (on my machine at home) it says SFW2-INext-DROP . . . PROTO=TCP SPT=7643 DPT=3506 Does anyone know why ssh is using port 3506 and not 22? I think this is why the firewall is blocking it. Does anyone know how to fix it? Using SuSE 9.2, Kernel 2.6.8-24.11-default, openssh-3.9p1-3.2. I'm behind a LinkSys router which is set to forward ssh to my home machine. My machine at work doesn't seem to suffer from this problem. Thanks for any help Eddie