From nobody Sat Jul 06 15:02:08 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 4WGYWz6kVxz5QlHW for ; Sat, 06 Jul 2024 15:02:23 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (pdx.rh.CN85.dnsmgr.net [65.75.216.6]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4WGYWz1L85z4fS6 for ; Sat, 6 Jul 2024 15:02:22 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Authentication-Results: mx1.freebsd.org; none Received: from gndrsh.dnsmgr.net (localhost [127.0.0.1]) by gndrsh.dnsmgr.net (8.13.3/8.13.3) with ESMTP id 466F29H6033041; Sat, 6 Jul 2024 08:02:09 -0700 (PDT) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: (from freebsd-rwg@localhost) by gndrsh.dnsmgr.net (8.13.3/8.13.3/Submit) id 466F28cR033040; Sat, 6 Jul 2024 08:02:08 -0700 (PDT) (envelope-from freebsd-rwg) From: "Rodney W. Grimes" Message-Id: <202407061502.466F28cR033040@gndrsh.dnsmgr.net> Subject: Re: OpenVPN suddenly working one way only In-Reply-To: <0a73a3e3-ebfe-4392-a598-5d76108f74e5@netfence.it> To: Andrea Venturoli Date: Sat, 6 Jul 2024 08:02:08 -0700 (PDT) CC: "Rodney W. Grimes" , Ronald Klop , freebsd-net@FreeBSD.org X-Mailer: ELM [version 2.4ME+ PL121h (25)] 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 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII 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:10494, ipnet:65.75.216.0/23, country:US] X-Rspamd-Queue-Id: 4WGYWz1L85z4fS6 > 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