port scanning and hidden servers

Denny Jodeit denny at jodeit.com
Wed Sep 7 08:31:03 PDT 2005



>
> Hello:
> 
> I have a user on my network with a Linux box that is
> performing a port scan on all the computers in my network
> manually. He's doing this 'because he can'. Although I've
> asked him not to, he continues to do so.
> 
> 1) How can I block or inhibit port scans launched against my
> freeBSD servers from within my network?
> 
> 2) How can I 'hide' my freeBSD servers from users on the
> network? (If they can't see them, then they don't know to
> scan them.)
> 
> Thanks in advance.
> 
> Harold


Try portsentry in conjunction with logcheck, both are in the ports.

D.

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