Net filtering puzzle

[Tony Arnold]

On Thu, 2005-06-09 at 16:17 +0200, Dennis Kaarsemaker wrote:
> On do, 2005-06-09 at 16:01 +0200, Dennis Kaarsemaker wrote:
> > * Even nmap shows these ports as filtered
> 
> nmap $ip from another machine show filtered
> nmap $ip from the machine itself shows open.
> 
> This indicates to me that the filtering is done outside the machien
> self, is this correct?

Given that iptables -L is empty, then I think this must be true,
although it is possible to set up a filtering rule on the machine which
allows connections from the local host, but not from a non-local host.

Have you done a 'netstat -l' to see you what ports are being listened
on?

Regards,
Tony.
-- 
Tony Arnold, IT Security Coordinator, University of Manchester,
IT Services Division, Kilburn Building, Oxford Road, Manchester M13 9PL.
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E: tony.arnold at manchester.ac.uk, H: http://www.man.ac.uk/Tony.Arnold