From nobody Mon Mar 6 21:04:37 2023 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 4PVrgT4C4lz3wNHB for ; Mon, 6 Mar 2023 21:04:53 +0000 (UTC) (envelope-from n6t@oscar.emu.st) Received: from f3.bushwire.net (smtp1.bushwire.net [IPv6:2403:580a:8087:0:203:0:120:11]) by mx1.freebsd.org (Postfix) with ESMTP id 4PVrgR3CVYz4bZ3 for ; Mon, 6 Mar 2023 21:04:50 +0000 (UTC) (envelope-from n6t@oscar.emu.st) Authentication-Results: mx1.freebsd.org; dkim=fail ("headers rsa verify failed") header.d=emu.st header.s=2019 header.b=j6+B95uO; spf=pass (mx1.freebsd.org: domain of n6t@oscar.emu.st designates 2403:580a:8087:0:203:0:120:11 as permitted sender) smtp.mailfrom=n6t@oscar.emu.st; dmarc=none Received: by f3.bushwire.net (Postfix, from userid 1001) id 3B9463B227; Tue, 7 Mar 2023 07:04:37 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/simple; d=emu.st; s=2019; t=1678136677; bh=rB0GBtEjrCRsN77N172wmhMmNTc=; h=Comments:Received:From:Comments:Message-ID:Date:Content-Type: Content-Transfer-Encoding:Subject:Content-Disposition:Mime-Version: References:To:In-Reply-To; b=j6+B95uOwMwhlydoFuya20CgJmbolC1MXRza88s5XB0PJvD4CZVl3MJ/rLGW5Q7yP t5C0bS5RNeS9J65onJvUw/7WJVYax8QBgESeD4fZY918CaqaO48PTez0g7dF0Ir9Ui f40Q0ZKfTyAARkcDFNnqhMY+TO+gEwwjmFA3Me0E=A3Me0E= Comments: QMDA 0.3a Received: (qmail 18322 invoked by uid 1001); 6 Mar 2023 21:04:37 -0000 From: "Mark Delany" Comments: QMDASubmit submit() 0.2.0-final Message-ID: <0.2.0-final-1678136677.164-0xb079cd@qmda.emu.st> Date: Mon, 6 Mar 2023 21:04:37 +0000 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Subject: Re: sshd doesn't disconnect for 30+ minutes after the TCP connection is closed ungracefully Content-Disposition: inline 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 References: <08DDB90C-5D30-40A3-86C0-87021959F04D@freebsd.org> <49CE5046-7934-414C-9B62-F3712DECBA52@karels.net> <540652d7-953b-12bc-42cc-982d4dd85849@wemm.org> To: freebsd-net@freebsd.org In-Reply-To: <540652d7-953b-12bc-42cc-982d4dd85849@wemm.org> X-Spamd-Result: default: False [-1.63 / 15.00]; R_DKIM_REJECT(1.00)[emu.st:s=2019]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.93)[-0.934]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip6:2403:580a:8087::0/48]; MIME_GOOD(-0.10)[text/plain]; RCVD_NO_TLS_LAST(0.10)[]; ARC_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MLMMJ_DEST(0.00)[freebsd-net@freebsd.org]; MIME_TRACE(0.00)[0:+]; DKIM_TRACE(0.00)[emu.st:-]; MID_RHS_MATCH_FROMTLD(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; FROM_HAS_DN(0.00)[]; ASN(0.00)[asn:4764, ipnet:2403:5800::/27, country:AU]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DMARC_NA(0.00)[emu.st]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Queue-Id: 4PVrgR3CVYz4bZ3 X-Spamd-Bar: - X-ThisMailContainsUnwantedMimeParts: N On 06Mar23, Peter Wemm allegedly wrote: > (~/.ssh/config with ServerAlive* probes) for different reasons.  The > (overloaded) router would drop connections that seemed idle.  Sending > probes helped prevent that - or at least making the router drop somebody > else's instead. Probably explains why I, quite likely on the same shuttle, ended up running this on the client side of my terminal sessions: while : do ssh snake.corp.youknowhoo.com tmux emacs echo Some dirty rat caused my connection to drop...again! sleep 2 done