It seems to me that IRC is both undesirable in a commercial sense, the
corporation firewalling it's network is unlikely to want IRC 'style'
recreational use anyway. If they do and you need to set up a
'secure-ish' IRC access method - the mIRC client supports SSL
connections, which may help. Personally I think it best that it be
kept out.... It took a while to get together the details of which
ports were used by IRC servers and I hope the following list is
exhaustive.... anyone who knows of any others, I would much appreciate
the information. (we block IRC even before the firewall - at the
router).
[CISCO]
! deny's IRC by filtering packets on IRC ports.
deny tcp any any eq 6661
deny tcp any any eq 6662
deny tcp any any eq 6663
deny tcp any any eq 6664
deny tcp any any eq 6665
deny tcp any any eq 6666
deny tcp any any eq 6667
deny tcp any any eq 6668
deny tcp any any eq 6669
deny tcp any any eq 6670
deny tcp any any eq 7000
deny tcp any any eq 124
deny tcp any any eq 529
deny tcp any any eq 6671
deny tcp any any eq 6673
deny tcp any any eq 6675
! end deny IRC
All the best,
<Mark>
================================================================
Mark Gillett, Computer Unit, St. Georges Hospital Medical School
----------------------------------------------------------------
Contrary to popular belief, Unix is user friendly. It just
happens to be very selective about who it decides to make
friends with.
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e-mail : mgillett @
sghms .
ac .
uk
web : http://www.sghms.ac.uk
================================================================
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