From nobody Thu Jan 13 20:17:25 2022 X-Original-To: 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 9D9411954A88; Thu, 13 Jan 2022 20:17:40 +0000 (UTC) (envelope-from glebius@freebsd.org) Received: from cell.glebi.us (glebi.us [162.251.186.162]) (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 "cell.glebi.us", Issuer "cell.glebi.us" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4JZbMR4t7Gz4qsD; Thu, 13 Jan 2022 20:17:39 +0000 (UTC) (envelope-from glebius@freebsd.org) Received: from cell.glebi.us (localhost [127.0.0.1]) by cell.glebi.us (8.16.1/8.16.1) with ESMTPS id 20DKHPsB072998 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Thu, 13 Jan 2022 12:17:25 -0800 (PST) (envelope-from glebius@freebsd.org) Received: (from glebius@localhost) by cell.glebi.us (8.16.1/8.16.1/Submit) id 20DKHP64072997; Thu, 13 Jan 2022 12:17:25 -0800 (PST) (envelope-from glebius@freebsd.org) X-Authentication-Warning: cell.glebi.us: glebius set sender to glebius@freebsd.org using -f Date: Thu, 13 Jan 2022 12:17:25 -0800 From: Gleb Smirnoff To: Michael Tuexen Cc: Chris , net@freebsd.org, current@freebsd.org Subject: Re: compressed TIME-WAIT to be decomissioned Message-ID: References: <933E3937-5ED9-4483-9C7E-1A2B91C78CD1@lurchi.franken.de> 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-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <933E3937-5ED9-4483-9C7E-1A2B91C78CD1@lurchi.franken.de> X-Rspamd-Queue-Id: 4JZbMR4t7Gz4qsD X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=softfail (mx1.freebsd.org: 162.251.186.162 is neither permitted nor denied by domain of glebius@freebsd.org) smtp.mailfrom=glebius@freebsd.org X-Spamd-Result: default: False [-1.01 / 15.00]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; FREEFALL_USER(0.00)[glebius]; RCPT_COUNT_THREE(0.00)[4]; TO_DN_SOME(0.00)[]; NEURAL_HAM_MEDIUM(-0.91)[-0.910]; FROM_HAS_DN(0.00)[]; MIME_GOOD(-0.10)[text/plain]; HAS_XAW(0.00)[]; DMARC_NA(0.00)[freebsd.org]; R_SPF_SOFTFAIL(0.00)[~all]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_SPAM_LONG(1.00)[1.000]; MLMMJ_DEST(0.00)[net,current]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:27348, ipnet:162.251.186.0/24, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N On Thu, Jan 13, 2022 at 09:06:50PM +0100, Michael Tuexen wrote: M> > I'm talking about statistics that I recently committed to CURRENT only: M> > M> > # netstat -sp tcp | grep TIME-WAIT M> > 3 times connection in TIME-WAIT responded with ACK M> > 0 times connection in TIME-WAIT was actively recycled M> > 0 times connection in TIME-WAIT responded with RST M> > M> > They show were the TIME-WAITs actually used. M> Aren't they also used on the client side to avoid reusing the same 5-tuple M> with the 2 * MSL period. This is not covered by the above (and possibly not M> relevant on the machine you where looking at). Good point. We are not counting this kind of use. -- Gleb Smirnoff