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Date:      Thu, 05 Jan 2023 08:35:25 +0000
From:      bugzilla-noreply@freebsd.org
To:        pf@FreeBSD.org
Subject:   [Bug 268717] [pf] rdr rules don't work for traffic originating at localhost
Message-ID:  <bug-268717-16861-MqZKCS7ciH@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-268717-16861@https.bugs.freebsd.org/bugzilla/>
References:  <bug-268717-16861@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D268717

--- Comment #6 from dfr@rabson.org ---
Created attachment 239274
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D239274&action=
=3Dedit
possible fix for redirects initiated by localhost

Redirect rules are triggered on PF_IN events to allow the rule to replace t=
he
destination address+port and also on PF_OUT events to reverse the replaceme=
nt
for packets flowing back towards the original source address. If the source=
 is
a local address, this second event is not triggered since the return packet=
 is
delivered to the local protocol stack.

A possible fix is to simulate the PF_OUT event for packets destined for loc=
al
processing, allowing the second part of the redirect to be applied. This do=
es
conflict with source address validation in 14-current which I'm disabling f=
or
testing. That could be mitigated by relaxing source address validation to a=
llow
packets with non-local source addresses pre-filtering.

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