My firewall logs are filled with message like
ipmon[85]: 18:52:39.107683 sis1 @0:18 b 196.28.87.75 ->
72.64.118.118 PR icmp len 20 56 icmp unreach/port
for 72.64.118.118,123 - 196.28.87.75,123
PR udp len 20 76 IN
72.64.118.118 is my pool server.
I am accepting udp packets for destination port 123 and everything
seems to be working correctly, but I don't understand what these ICMP
packets are about. No doubt this reflects my substantial ignorance
of IP, but I would like to know whether I should/need to allow ICMP
through as well as udp 123 for NTP to work properly.
The log line is from ipfilter running on a m0n0wall system. sis1 is
the WAN facing interface.
Cheers,
-j
--
Jeffrey Goldberg http://www.goldmark.org/jeff/
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