I have a weird situation in work. I've just recently set up a two-tier
firewall (cisco router and linux and ipchains). Packets I was denying and
logging were being sent to ports 3 and 4.
These packets seemed to be coming from Lotus Notes. 3 is said to be
compressnet (never heard of it, but I'm guessing it's some sort of
compressed data protocol). 4 is unused.
At the moment I'm forwarding the packets on to their destination (behind
the firewall), but I'm not happy about it. Lotus Notes won't without it,
though.
Anyone have more information on these ports or Lotus Notes' behaviour?
Log:
Apr 12 18:26:30 banba kernel: Packet log: forward ACCEPT eth0 PROTO=1
<Firewall address>:3 <notes server behind firewall>:4 L=56 S=0x00 I=1801
F=0x0000 T=254 (#6)
Apr 12 18:27:56 banba kernel: Packet log: forward ACCEPT eth0 PROTO=1
<Firewall address>:3 <notes server behind firewall>:4 L=56 S=0x00 I=1802
F=0x0000 T=254 (#6)
Generally get two packets at a time, then nothing for a few minuts (maybe
it's some sort of fscked up authentication packet?).
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