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Date:      Sat, 6 Jul 2024 08:02:08 -0700 (PDT)
From:      "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net>
To:        Andrea Venturoli <ml@netfence.it>
Cc:        "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net>, Ronald Klop <ronald-lists@klop.ws>, freebsd-net@FreeBSD.org
Subject:   Re: OpenVPN suddenly working one way only
Message-ID:  <202407061502.466F28cR033040@gndrsh.dnsmgr.net>
In-Reply-To: <0a73a3e3-ebfe-4392-a598-5d76108f74e5@netfence.it>

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> On 7/6/24 02:17, Rodney W. Grimes wrote:
> > Host A *still* has/had a port open, and that port can lingere
> > for several reasons, and that can cause issues.
> > 
> > Ok, good, check both A and B.
> 
> I had checked this too: neither A nor B had the port still open.
> 
> 
> 
> > MTU's?  Have you manually checked path MTU to make sure that it
> > can carry your payload correctly IN BOTH DIRECTIONS.  I have
> > seen asymetrical routes cause MTU issues due to it being smaller
> > in one direction.
> 
> That's the first thing I thought: however a simple ping does not get 
> through and that's a small packed.

Are you pinging the inside or outside address of the vpn?
If you cant even ping the outside IP of a VPN you have
basic connectivity problems that must be fixed before even
attempting a VPN.

>   bye & Thanks
> 	av.

-- 
Rod Grimes                                                 rgrimes@freebsd.org



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