From nobody Wed May 19 21:15:05 2021 X-Original-To: freebsd-current@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 D255A8C63CC for ; Wed, 19 May 2021 21:15:08 +0000 (UTC) (envelope-from tuexen@freebsd.org) Received: from drew.franken.de (mail-n.franken.de [193.175.24.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.franken.de", Issuer "Sectigo RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Flly4501Hz4YHx for ; Wed, 19 May 2021 21:15:08 +0000 (UTC) (envelope-from tuexen@freebsd.org) Received: from smtpclient.apple (ip4d15f626.dynamic.kabel-deutschland.de [77.21.246.38]) (Authenticated sender: macmic) by mail-n.franken.de (Postfix) with ESMTPSA id D72E0721A5A66; Wed, 19 May 2021 23:15:05 +0200 (CEST) Content-Type: text/plain; charset=us-ascii List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.80.0.2.43\)) Subject: Re: Some odd TCP behavior (timeouts) From: Michael Tuexen In-Reply-To: <877716937.20611434.1621446044943.JavaMail.zimbra@schweikhardt.net> Date: Wed, 19 May 2021 23:15:05 +0200 Cc: freebsd-current Content-Transfer-Encoding: quoted-printable Message-Id: <46A397AE-E94D-4A31-A14B-1411BA673799@freebsd.org> References: <877716937.20611434.1621446044943.JavaMail.zimbra@schweikhardt.net> To: Jens Schweikhardt X-Mailer: Apple Mail (2.3654.80.0.2.43) X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=disabled version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on mail-n.franken.de X-Rspamd-Queue-Id: 4Flly4501Hz4YHx X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[] > On 19. May 2021, at 19:40, Jens Schweikhardt = wrote: >=20 > Hello,=20 >=20 > I'm having a TCP connectivity issue stumping me and driving me crazy. > The TLDR version: No more printing on my LaserJet (but ping works), > while printing and the web interfacw works fine under Windows. > Other TCP connections apparently flawless. > Wireshark shows FreeBSD performing the three way handshake but > then ignoring some packets sent from the printer (no ACKs) > and retransmitting until timeout hits. >=20 > The details with the wireshark logs are on=20 > = https://superuser.com/questions/1649435/mysterious-tcp-http-issue-accessin= g-laserjet-web-interface Hi Jens, I only see screen shots, but not a link a the actual log files. Could you share the a .pcap or .pcapng file? You can send them to me via = e-mail, if you prefer. Best regards Michael >=20 > I have seen a few commits to CURRENT's tcp and timeout code recently. > I went back to stable/13 as of two days ago, but still no joy. >=20 > Has anyone else noticed something going on with TCP? > Especially HTTP/HTTPS, like connections timing out in rare cases? > If you have a LaserJet (preferably 551dn), can you still access > its web interface, or get a reply with >=20 > printf "GET / HTTP/1.0\r\n\r\n" | nc LaserJet 80 # or 443. >=20 > Regards, >=20 > Jens > --=20 > Jens Schweikhardt http://www.schweikhardt.net/ > SIGSIG -- signature too long (core dumped) >=20