Date: Mon, 13 Aug 2007 17:19:35 -0700 From: Chuck Swiger <cswiger@mac.com> To: Modulok <modulok@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Redundant network router setup? Message-ID: <5F59BCBE-FCEA-4D2A-8A69-E0CE9B3A86A0@mac.com> In-Reply-To: <64c038660708131659m68620db9of8d93bd079d1fb29@mail.gmail.com> References: <64c038660708131659m68620db9of8d93bd079d1fb29@mail.gmail.com>
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On Aug 13, 2007, at 4:59 PM, Modulok wrote: > QUESTION: Is there a way to setup a redundant router, such that I can > offload traffic from the primary router to another machine, without > breaking TCP sessions? There are several ways of setting up such redundancy; the common case which Cisco calls VRRP, you can use under FreeBSD as CARP. However, this approach is limited to pure routing; it does not handle replicating the NAT state tables: > BACKGROUND: I have a FreeBSD machine acting as a gateway, running > natd(8) through ipfw(8). ...which you mention you are using. I don't know of any way to provide redundancy for existing connections going via natd. -- -Chuck
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