Re: why multi-hop icmp redirects to on 13.0 ?

From: John Hay <>
Date: Sun, 05 Dec 2021 18:20:08 UTC
Hi Bjoern,

On Sun, 5 Dec 2021 at 19:19, Bjoern A. Zeeb <> wrote:

> On Sat, 4 Dec 2021, Bjoern A. Zeeb wrote:
> > On Sat, 4 Dec 2021, Kurt Jaeger wrote:
> >
> > I can reproduce some of this problem in the lab:
> Here's a fix for HEAD.

Something I have observed is that if you use FreeBSD 13 as a router with 2
subnets on the same interface, it will generate redirects when hosts send
packets to the other subnet via the FreeBSD router. I think it is wrong.
The host does not have a more direct way to get to the other subnet. RFC792
on page 13 does not talk about interfaces, but networks, "If G2 and the
host identified by the internet source address of the datagram are on the
same network...".



> /bz
> --
> Bjoern A. Zeeb                                                     r15:7