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Date:      Fri, 03 Jan 2020 18:27:42 +0000
From:      bugzilla-noreply@freebsd.org
To:        doc@FreeBSD.org
Subject:   [Bug 243062] man ppp: mention default ppp_nat="YES" for rc.conf
Message-ID:  <bug-243062-9@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243062

            Bug ID: 243062
           Summary: man ppp: mention default ppp_nat=3D"YES" for rc.conf
           Product: Documentation
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Manual Pages
          Assignee: bugs@FreeBSD.org
          Reporter: contact@evilham.com
                CC: doc@FreeBSD.org

I just lost some time over this and didn't think of checking rc defaults or
rc.conf, except when someone mentioned it on IRC.

There was a related bug for the handbook:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D44443

Having that patch in the handbook would have also saved me the surprise, as=
 man
ppp basically suggests that the NAT functionality is disabled by default, b=
ut
starting ppp with rc.conf contradicts that.

I would think mentioning this behaviour with a hint to man rc.conf would be
enough, this can be done under:

NETWORK ADDRESS TRANSLATION (PACKET ALIASING)

But would also be useful on the second paragraph of the description, where =
the
-nat flag is introduced.

I am willing to propose a patch for this and to re-open 44443 and propose a
patch for it too if this approach were acceptable.

FTR, this is what I was working on when I discovered this issue and would
re-use bits of it as real-life examples of using ppp(oe) on FreeBSD.

https://evilham.com/en/blog/2019-FreeBSD-eXO-router/#pppoe
https://evilham.com/en/blog/2020-FreeBSD-home-router-legacy-ipv4/#local-leg=
acy-ipv4-networking-nat-implementing
(as of this bug report these are quite advanced drafts but require more
editing)

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