28 Apr
2017
28 Apr
'17
5:59 p.m.
Actually that's not people sending it :-)
It is a side effect of opening a multicast socket for receiving the RIP
messages and happens automatically. Such a sockets will subscribe to the
RIP multicast group and maintain this subscription periodically.
Basically there is nothing to do to avoid it.
Marius, YO2LOJ
On 2017-04-28 20:04, Brian Kantor wrote:
(Please trim inclusions from previous messages)
_______________________________________________
Recently I noticed people sending IGMP protocol packets to amprgw, which
discards them (as it does for all multicast destinations sent to it).
I don't think I'm going to write the necessary code to handle group
membership, so dropping the packet is probably the best thing to do.
Amprgw currently does NOT send 'destination unreachable' ICMP packets,
including 'protocol unreachable', because those should be rate limited
which makes coding the necessary response mechanism somewhat complicated.
(True, I could steal the necessary code from the FreeBSD kernel and
adapt it, but that's a lot of work. Maybe someday.) And I also don't
want to use up encap bandwidth sending ICMP back to the AMPR hosts.
The only ICMP that amprgw currently will originate is TIMXCEED when an
encapped packet's TTL reaches zero, so that 'traceroute' will work.
- Brian
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