RE: [FW1] Multiple WAN Links.

[Mark L. Decker]

Actually, there is a way to do this (at least for outbound access and mail) without BGP, but it requires two firewalls in a RainWall cluster.  You connect one firewall to ISP A and the other firewall to ISP B, and both to the same internal subnet.  The firewall A does NAT using range from ISP A, and firewall B does NAT using range from ISP B.  Then you set up the RainWall Ping Monitor to watch the ISP links.  If link to ISP A goes down, RainWall can automatically disable firewall A, and move its internal IP address to firewall B, thereby redirecting users out to ISP B.  This also allows load sharing of outbound traffic between the two links.  It does not help in the case of inbound access to an internally hosted webserver, but mail will still work if you use multiple MX records.  Failover is automatic, but not transparent (because src/dest pair changes).  Not a perfect solution, but then neither is BGP.   Mark L. Decker Rainfinity [EMAIL PROTECTED] (408) 382-4870 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of CryptoTech Sent: Thursday, November 02, 2000 6:12 AM To: Gunjan Mathur at 9netave Cc: [EMAIL PROTECTED] Subject: Re: [FW1] Multiple WAN Links. This can only be handled by BGP and cooperation between the ISP's.  FireWall-1 will not change it's security policy/nat policy when a wan link drops. Gunjan Mathur at 9netave wrote: I have two WAN links using PPP with static routes >from diff. ISP, Now I want if my one links goes down then automatical second link handel all the things and if both are up then load balancing will happen. and I'm using NATting of my LAN traffic on firewall with one ISP's IP range. If the link of this ISP goes down then all my LAN users are unable to access the net,b'caz of this NATting. How I configure my structure in such a way if one the link of NATting ISP's is down then second link handel the traffic.     GM