From: Florian Westphal <fw@strlen.de>
To: Slavko <linux@slavino.sk>
Cc: netfilter ML <netfilter@vger.kernel.org>
Subject: Re: nftables RP filter and loopback
Date: Tue, 22 Apr 2025 13:43:52 +0200 [thread overview]
Message-ID: <20250422114352.GA2092@breakpoint.cc> (raw)
In-Reply-To: <905173BB-6745-4B59-8795-F9AC1E063A38@slavino.sk>
Slavko <linux@slavino.sk> wrote:
> Hi all,
>
> i encounter strange problem with reverse path filter in nftables,
> which i don't understand, thus i ask for help.
>
> Some background -- for long time i have on my desktop (with
> some bridges/veths for LXC, VirtualBox ifaces, and one dummy
> iface) this prerouting chain (to shorten it i removed counter and
> log parts):
>
> chain r_prerouting {
> type filter hook input priority raw; policy accept;
~~~~~
This is an input chain. The loopback bypass is restricted
to PRE_ROUTING before v6.15-rc1.
(This is an oversight, originally fib was rejected in input chain, and
when that restriction got lifted the lo bypass check wasn't adjusted).
next prev parent reply other threads:[~2025-04-22 11:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-22 8:49 nftables RP filter and loopback Slavko
2025-04-22 11:43 ` Florian Westphal [this message]
2025-04-22 12:32 ` Slavko
2025-04-22 12:53 ` Florian Westphal
2025-04-22 13:15 ` Slavko
2025-04-22 14:15 ` Pablo Neira Ayuso
2025-04-23 9:10 ` Florian Westphal
2025-04-23 11:51 ` Pablo Neira Ayuso
2025-04-23 12:06 ` Florian Westphal
2025-04-23 20:56 ` Pablo Neira Ayuso
2025-04-23 20:58 ` Pablo Neira Ayuso
2025-04-26 8:39 ` Slavko
2025-04-26 9:24 ` Florian Westphal
2025-04-26 9:40 ` Slavko
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