11 Apr
2015
11 Apr
'15
9:07 a.m.
Btw Don, broadcast/multicast messages should not be rejected with ICMP
unreachable, but dropped, since the may not be addressed to your system,
like in this case.
Rejecting them just generates useless ICMP traffic, and they could even be
legitimate traffic.
As a general approach on such cases.
8:20:25.632390 IP 81.174.253.193 > 192.168.1.150:
IP 44.131.160.1.5678 >
255.255.255.255.5678: UDP, length 120 (ipip-proto-4)
08:20:25.635667 IP 192.168.1.150 > 81.174.253.193: IP 44.135.90.2 >
44.131.160.1: ICMP host 255.255.255.255 unreachable, length 36
(ipip-proto-4)