From nobody Sat Jul 06 07:46:49 2024 X-Original-To: freebsd-net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4WGMsW4X0vz5PlR0 for ; Sat, 06 Jul 2024 07:46:55 +0000 (UTC) (envelope-from ml@netfence.it) Received: from soth.netfence.it (mailserver.netfence.it [78.134.96.152]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mailserver.netfence.it", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4WGMsW1609z414j for ; Sat, 6 Jul 2024 07:46:55 +0000 (UTC) (envelope-from ml@netfence.it) Authentication-Results: mx1.freebsd.org; none Received: from [10.1.2.18] (mailserver.netfence.it [78.134.96.152]) (authenticated bits=0) by soth.netfence.it (8.18.1/8.17.2) with ESMTPSA id 4667knv8063885 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO); Sat, 6 Jul 2024 09:46:50 +0200 (CEST) (envelope-from ml@netfence.it) X-Authentication-Warning: soth.netfence.it: Host mailserver.netfence.it [78.134.96.152] claimed to be [10.1.2.18] Message-ID: <0a73a3e3-ebfe-4392-a598-5d76108f74e5@netfence.it> Date: Sat, 6 Jul 2024 09:46:49 +0200 List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: OpenVPN suddenly working one way only Content-Language: en-US To: "Rodney W. Grimes" Cc: Ronald Klop , freebsd-net@FreeBSD.org References: <202407060017.4660HdGk030549@gndrsh.dnsmgr.net> From: Andrea Venturoli In-Reply-To: <202407060017.4660HdGk030549@gndrsh.dnsmgr.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.86 X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:35612, ipnet:78.134.0.0/17, country:IT] X-Rspamd-Queue-Id: 4WGMsW1609z414j 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. bye & Thanks av.