From owner-freebsd-questions Tue Nov 25 14:33:59 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id OAA10463 for questions-outgoing; Tue, 25 Nov 1997 14:33:59 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id OAA10445 for ; Tue, 25 Nov 1997 14:33:55 -0800 (PST) (envelope-from toor@dyson.iquest.net) Received: (from root@localhost) by dyson.iquest.net (8.8.7/8.8.8) id RAA00370; Tue, 25 Nov 1997 17:33:49 -0500 (EST) (envelope-from toor) From: "John S. Dyson" Message-Id: <199711252233.RAA00370@dyson.iquest.net> Subject: Re: I'm at the end of my rope In-Reply-To: <199711252028.MAA02522@itchy.serv.net> from "Sean T. Lamont .lost." at "Nov 25, 97 12:28:37 pm" To: zeno@serv.net (Sean T. Lamont .lost.) Date: Tue, 25 Nov 1997 17:33:49 -0500 (EST) Cc: questions@FreeBSD.ORG Reply-To: dyson@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL31 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Sean T. Lamont .lost. said: > > For approximately six months, a server we have been using for public > shell access has been crashing every 24-144 hours. The times are > essentially random. > Have you asked for help before on the list? Lots of things can cause the system to be unstable, depending on the applications being run. The only way to make any system bulletproof is to understand how to configure it. Every version of U**X has it's own personality. Things that can bite you are: 1) Swap space. 2) Mbuf space. 3) Hacker attacks (very unfriendly users.) 4) Typical U**X attacks can make the system less stable and require careful tuning. (Like DOS attacks, such as forkbombs.) There are other things that can hurt also. -- John dyson@freebsd.org jdyson@nc.com