From owner-freebsd-questions@FreeBSD.ORG Thu Sep 4 19:05:12 2008 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 370111065674 for ; Thu, 4 Sep 2008 19:05:12 +0000 (UTC) (envelope-from reddvinylene@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.170]) by mx1.freebsd.org (Postfix) with ESMTP id 8AF588FC17 for ; Thu, 4 Sep 2008 19:05:11 +0000 (UTC) (envelope-from reddvinylene@gmail.com) Received: by ug-out-1314.google.com with SMTP id o4so48308uge.39 for ; Thu, 04 Sep 2008 12:05:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type:references; bh=ShNpuWqwAr2PN0MHO/iuHriBe5u2VbtbSnKbPMakm6Y=; b=fsWWjmp9qyfbkjvvJPNpks+JO8MPeb+6CZB5RsjqfGOXlHb0P5BhCog5XEnTGkbbZR ywlj4+SMTwWf/arUzgUGxntQ2lctnDaRrUcVr/WjfsyHhGVsf4SQ2D3NkdmXjRDFbl62 sR6jeay98kQqwiEZy4y1WzllX/QNwqngzfHkU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:references; b=xx1HKwxeivKO8g6Czu3Wn3O+X/hYZskslF2v3yabmDYHo07eIhHs9sMVNxIjLUT0vv eOajj748iJoVygVeCHwhZhO4C1/sJiL2TgkXP10U+55+wgajEUEKUGC5T8Lulb1fa2Ip 9cGiMeV4WBmyoIlLvb2lVmD2h9zXkgyEPLpD8= Received: by 10.187.232.20 with SMTP id j20mr2481702far.69.1220555109827; Thu, 04 Sep 2008 12:05:09 -0700 (PDT) Received: by 10.187.205.5 with HTTP; Thu, 4 Sep 2008 12:05:09 -0700 (PDT) Message-ID: Date: Thu, 4 Sep 2008 21:05:09 +0200 From: "Redd Vinylene" To: questions@freebsd.org In-Reply-To: MIME-Version: 1.0 References: <2620c3260808301722s673f70dkab7590f1ed9e48a4@mail.gmail.com> <48BAB1C1.8020802@infracaninophile.co.uk> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Re: How to test the uptime of a webserver? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Sep 2008 19:05:12 -0000 On Thu, Sep 4, 2008 at 8:58 PM, Redd Vinylene wrote: > > On Sun, Aug 31, 2008 at 4:59 PM, Matthew Seaman < > m.seaman@infracaninophile.co.uk> wrote: > >> Redd Vinylene wrote: >> >>> On Sun, Aug 31, 2008 at 2:22 AM, Moises Castellanos >>> wrote: >>> >>>> >>>> On Sun, Aug 31, 2008 at 7:05 PM, Redd Vinylene >>>> wrote: >>>> >>> >> I got this dedicated server which is exposed to DDoS attacks quite >>>>> frequently. Say I need to host a website on it, is there any way of >>>>> telling how often it is actually online (to the rest of the world)? >>>>> >>>>> Maybe make some sort of ping script from a remote server? >>>>> >>>> >> You can install nagios and monitor the web server. It will send you an >>>> email when >>>> the server is down and when is up again. With this information you can >>>> know >>>> the uptime >>>> of the web server. >>>> >>> >> I'd have to install Nagios on a different server then, right? I doubt >>> the actual server knows when its ISP's link drops (or just slows down) >>> due to an attack. >>> >> >> Not necessarily. You can install nagios on your web server and use it >> to monitor a server at the other end of your wan link -- usually a >> machine in your ISPs infrastructure[*] -- on the basis that if you can get >> packets out, then other people can get packets in. The trick is to monitor >> something that isn't too far away, or you'll end up monitoring the >> availability of other people's networks, rather than your own. >> >> There's a lot more can be done than just monitoring connectivity by >> sending ICMP ping packets every so often. There are any number of >> ways a web server can go wrong -- processes can crash, critical disk >> partitions can fill up, load spikes can overwhelm the machine's capacity. >> You can develop a range of different nagios tests that should tell you >> pretty much at a glance just what has gone wrong. Takes all the fun out >> of diagnosing the problems perhaps, but it does mean you'll be back to >> bed sooner when the pager goes off in the small hours. >> >> Cheers, >> >> Matthew >> >> [*] Some ISPs provide machines specifically for this purpose. >> >> -- >> Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard >> Flat 3 >> PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate >> Kent, CT11 9PW >> >> > Thank you guys. I'm looking for the simplest solution though, like a simple > oneliner, or a shell script. > > Anybody have an idea? > > -- > http://www.home.no/reddvinylene > I'll try to write a simple shell script and report back to y'all. -- http://www.home.no/reddvinylene