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Date:      Tue, 02 Mar 2021 02:33:44 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 248474] if_ipsec: NAT broken on IPsec/VTI
Message-ID:  <bug-248474-7501-FMrOcmIoVQ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-248474-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-248474-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248474

jeremy.mordkoff@riftio.com changed:

           What    |Removed                     |Added
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                 CC|                            |jeremy.mordkoff@riftio.com

--- Comment #35 from jeremy.mordkoff@riftio.com ---
(In reply to Andrey V. Elsukov from comment #17)

I have a VTI routed tunnel already to another PF Sense. LAN to LAN, no NAT,
wide open firewall rules. Bi directional traffic. Works fine.=20

I was trying to create a second VTI tunnel to a different server, but this =
one
needed SNAT. It is outbound only. The new tunnel was dropping all replies. I
could see them arrive on the ipsec* interface but they never exited the rou=
ter
on the LAN interface.=20

These sysctl changes allowed the new tunnel to work, but they half-break the
existing LAN to LAN tunnel. Hosts on the "CORE" side where I made these sys=
ctl
changes can still reach systems in the remote LAN, but the remote LAN cannot
access the core LAN. Again, they arrive on ipsec* but they never exit the L=
AN
port.=20

(a) Is there a way to have he best of both worlds? I suspect not.=20
(b) Is there a way to configure the old LAN to LAN tunnel such that inbound
traffic will flow again?

--=20
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