odd problem with firewall server

[Matt Singerman]

Hi all,

This probably isn't a FreeBSD-specific problem, but it's vexing nonetheless.

So we have our servers accessing the outside world through their own
firewall on a FreeBSD machine.  Nothing too fancy, just routing
traffic and shutting off unused ports.  However, this morning the
ethernet jack that the firewall server's world-accessible ethernet
port (dc1) was plugged into.  The solution: plug it into another jack
:)  This amazingly complex solution worked, except that I can now no
longer ssh or ping the machine.  Any ideas as to what may have caused
this?

Thanks,

Matt