Date: Sun, 5 Dec 2021 20:20:08 +0200 From: John Hay <jhay@meraka.org.za> To: "Bjoern A. Zeeb" <bz@freebsd.org> Cc: Kurt Jaeger <pi@freebsd.org>, freebsd-net <freebsd-net@freebsd.org> Subject: Re: why multi-hop icmp redirects to 0.0.0.0 on 13.0 ? Message-ID: <CAGv8uarUvftonP9LBOPmVksqTz7pFuQoUP2OJFG4BKBTex6VAw@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.2112051718171.68830@ai.fobar.qr> References: <Yast8d1dRd7ZFWr3@fc.opsec.eu> <alpine.BSF.2.00.2112041609520.68830@ai.fobar.qr> <YauV138P1xyB53Ja@fc.opsec.eu> <alpine.BSF.2.00.2112041633090.68830@ai.fobar.qr> <YaufYWCM9YOUG5Op@fc.opsec.eu> <alpine.BSF.2.00.2112041905270.68830@ai.fobar.qr> <alpine.BSF.2.00.2112051718171.68830@ai.fobar.qr>
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--00000000000059d17905d26a3110 Content-Type: text/plain; charset="UTF-8" Hi Bjoern, On Sun, 5 Dec 2021 at 19:19, Bjoern A. Zeeb <bz@freebsd.org> 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 https://reviews.freebsd.org/D33274 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...". Regards John > /bz > > -- > Bjoern A. Zeeb r15:7 > > --00000000000059d17905d26a3110--
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