Date: Tue, 15 Jun 1999 00:40:58 +0100 From: Brian Somers <brian@Awfulhak.org> To: star@iwl.net Cc: hackers@FreeBSD.ORG Subject: Re: NAT Gateway to multiple ISPs Message-ID: <199906142340.AAA47618@keep.lan.Awfulhak.org> In-Reply-To: Your message of "Mon, 14 Jun 1999 08:06:14 CDT." <199906141306.IAA12874@star1.iwl.net>
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> > Any ideas on the following ? > > I am setting up a home/office network with NAT filtering gateway > on a dual-NIC FreeBSD 3.2 box. No problem so far - I've set > up several like this on 2.2.8 using natd. > > The new wrinkle is this: I need to connect to two ISPs > (DSL & Cable Modem), ideally with automatic failover and > load balancing when multiple internal PC's are generating > internet traffic. > > I know that this requires running gated (or routed) to > receive RIP or OSPF messages from the ISPs, and to select the > best outgoing ISP's route. > > The key question is: while the routing program probably > requires a third NIC so that each external link has its own > device, how can natd handle multiple external internet > interfaces. [.....] > 3) Configure an internal pseudo-device (tun ?) or divert > interface between natd (and the internal NIC) on the inside > and gated or routed (and the two external NICS) on the > outside. > This way, natd and the routing program would be completely > isolated and wouldn't need to know that the other existed. > > ISP1 - NIC1 > \ > gated - TUN - natd - NIC3 - internal net > / device > ISP2 - NIC2 > > > The third seems the best choice, but I haven't seen any > discription of this type of configuration. Except of course for the working example I mailed you on June 9 and committed to src/share/examples/ppp. > Any advice ? > > Thanks very much for your help, > > Andy Starratt -- Brian <brian@Awfulhak.org> <brian@FreeBSD.org> <http://www.Awfulhak.org> <brian@OpenBSD.org> Don't _EVER_ lose your sense of humour ! <brian@uk.FreeBSD.org> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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