Date: Thu, 18 Apr 2002 17:42:50 +0300 From: Ruslan Ermilov <ru@FreeBSD.ORG> To: Michael Loftis <mloftis@wgops.com> Cc: Giannis Nikopoulos <nikop@zeus.cs.uoi.gr>, freebsd-ipfw@FreeBSD.ORG Subject: Re: Load balancing with NATD Message-ID: <20020418144250.GF70982@sunbay.com> In-Reply-To: <3CB9B72B.7020908@wgops.com> References: <200204071726.UAA12257@pontus.cs.uoi.gr> <3CB9B72B.7020908@wgops.com>
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[-- Attachment #1 --] On Sun, Apr 14, 2002 at 10:06:51AM -0700, Michael Loftis wrote: > natd won't be doing what you want..... Not quite anyway, but what you > might want to do is take the natd source, modify it to do your bidding > (IE cahnge the round-robin alogrithm that it currently supports) and > then run it that way. It shouldn't be too difficult. Someone also > mentioned in another thread called (I think) dcpd or similar, basically > a divert(4) framework program to which you can plug in your own code to > do the dirty. > Yes it does support this, but in a simplistic form. Search for the "LSNAT" word in the natd(8) and libalias(3) manpages. > Giannis Nikopoulos wrote: > > >Hello everybody !!! > > > >I 'm just a new member of both the FreeBSD world and this list > >so I hope you will bare with my ignorance. > > > >This is the problem: > > > >I have a FreeBSD 4.5 running as a router between the outer world and > >a private network (192.168.0.0) of 3 servers. I use natd to handle > >traffic between the outer world and the PN. My goal (as part of a simple > >university course project) is to perform load balancing among the 3 > >back-end servers. I 've written down a load balancing algorithm, that > >uses reporting agents running on the 3 servers and reporting their load > >on a central coordinator running on the FreeBSD router. The question is: > > > >How can I use natd (or maybe another tool, say ipfw or some proxy, I don't > >know) in order to dynamically dispatch (redirect) incoming connections > >among the 3 back-end servers. As far as I can tell, natd performs > >redirection > >(along with address translation) but in a static way (correct me if I 'm > >wrong, I 've already explained I 'm new to this stuff). > > > >Is there any I way I can instruct natd to selectively choose to which > >server > >it will redirect a connection by applying a set of rules or I will have to > >hack into natd's source code. > > > >I don't know if I should have provided more feedback on this case but or be > >a little more specific. Can anyone help ? > > > >Thanx in advance > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-ipfw" in the body of the message -- Ruslan Ermilov Sysadmin and DBA, ru@sunbay.com Sunbay Software AG, ru@FreeBSD.org FreeBSD committer, +380.652.512.251 Simferopol, Ukraine http://www.FreeBSD.org The Power To Serve http://www.oracle.com Enabling The Information Age [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE8vttqUkv4P6juNwoRAu9aAJ4oOmXveXTOffbHyNTAFH24LOPzfQCeLcs8 tHCGSsB/1t9CunCVh4V7sp8= =8emV -----END PGP SIGNATURE-----
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