[K12OSN] port blocking

[Jim Anderson]

Hello all,

I'm running K12LTSP v.5 in a computer lab that includes 2 Windows clients
hanging off the internal network.  We've received notice from the ISP that
suspicious activity is occurring from the server's outside IP address on
three different ports.  How can I block those ports (I think the problem
could be originating from the Windows 2000 machines).

Jim
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