Date: Sat, 6 Jul 2024 16:13:31 +0000 From: "Patrick M. Hausen" <hausen@punkt.de> To: Andrea Venturoli <ml@netfence.it> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: OpenVPN suddenly working one way only Message-ID: <AC8533A8-F877-4934-8907-6532C44D9CF7@punkt.de> In-Reply-To: <dd0115c5-f07b-4f3c-8158-ed2594011890@netfence.it> References: <202407061502.466F28cR033040@gndrsh.dnsmgr.net> <dd0115c5-f07b-4f3c-8158-ed2594011890@netfence.it>
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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? Kind regards, Patrick -- punkt.de GmbH Patrick M. Hausen .infrastructure Sophienstr. 187 76185 Karlsruhe Tel. +49 721 9109500 https://infrastructure.punkt.de info@punkt.de AG Mannheim 108285 Geschäftsführer: Daniel Lienert, Fabian Stein
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