From owner-freebsd-stable Mon Mar 20 12:47:37 2000 Delivered-To: freebsd-stable@freebsd.org Received: from freefall.freebsd.org (freefall.FreeBSD.ORG [204.216.27.21]) by hub.freebsd.org (Postfix) with ESMTP id 0E7C537C715; Mon, 20 Mar 2000 12:33:54 -0800 (PST) (envelope-from kris@FreeBSD.org) Received: from localhost (kris@localhost) by freefall.freebsd.org (8.9.3/8.9.2) with ESMTP id MAA94172; Mon, 20 Mar 2000 12:33:54 -0800 (PST) (envelope-from kris@FreeBSD.org) X-Authentication-Warning: freefall.freebsd.org: kris owned process doing -bs Date: Mon, 20 Mar 2000 12:33:54 -0800 (PST) From: Kris Kennaway To: "Art Neilson, WH7N" Cc: stable@freebsd.org Subject: Re: net.inet.tcp.always_keepalive: 1 In-Reply-To: <3.0.6.32.20000318074032.00916500@pilikia.hi.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, 18 Mar 2000, Art Neilson, WH7N wrote: > I've been running 3.4-Stable for a while now and finally updated my > /etc/defaults/rc.conf from /usr/src/etc/defaults/rc.conf. I noticed > the new sysctl toggles in the conf file, and was wondering what this one > in particular did? I thought keepalive packets were for systems connected > up to providers who whould time them out if they had no activity for x > length of time. The comment here seems to indicate it is for cleanup > of dead connections. Can someone enlighten me or point me to relevant doc? > > tcp_keepalive="YES" # Kill dead TCP connections (or NO). TCP keepalives and PPP keepalives are different things. The former is for detecting and killing dead connections where the other end silently rebooted or dropped off the network, the latter is to defeat the idle timeout of an ISP (a 'PPP keepalive' can usually be any traffic sent over the modem, like a ping once a minute to an outside address). Kris ---- In God we Trust -- all others must submit an X.509 certificate. -- Charles Forsythe To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message