Re: OpenVPN suddenly working one way only

From: Michael Tuexen <michael.tuexen_at_lurchi.franken.de>
Date: Sat, 06 Jul 2024 16:24:10 UTC
> On 6. Jul 2024, at 18:13, Patrick M. Hausen <hausen@punkt.de> wrote:
> 
> Hi all,
> 
>> Am 06.07.2024 um 18:07 schrieb Andrea Venturoli <ml@netfence.it>:
>> It's almost surely due to a problem with the UDP packets that implement the VPN: again, according to tcpdump they go out host B, but never reach host A.
> 
> Is it remotely possible that one of the ISPs blocks these UDP packets as part
> of an automatic "DoS protection" mechanism?
Or are any kind of NAT or Firewall involved which might loose state?
Are you using public addresses on host A and B?

Best regards
Michael
> 
> Kind regards,
> Patrick
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