Re: Discarding inbound ICMP REDIRECT by default
- In reply to: Rodney W. Grimes: "Re: Discarding inbound ICMP REDIRECT by default"
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Date: Fri, 14 Jun 2024 14:57:13 UTC
On Fri, 14 Jun 2024 at 09:57, Rodney W. Grimes <freebsd-rwg@gndrsh.dnsmgr.net> wrote: > > I am not sure that it would "hang" the port, but by ignoring the > rediect your going to place additional burden on the router that > is trying to redirect you as all packets would have to be forwarded > by that router. I suppose it could hang you if infact the router > sent the redirect but did not forward the packet for you expecting > that a retransmission with your updated routing table due to the > redirect would get the flow going. The router is required to forward the packet (RFC1812); if an ICMP REDIRECT is necessary it is sent as the final step in unicast forwarding.