Hopefully an easy one this...
I'm setting up a VPN between a PIX 501 and an ISA 2004 box. I've been through the config for this and it works fine at the moment, as both the PIX and the ISA boxes have public IP addresses so can talk to each other directly: PIX -- Web -- ISA. However, the complication is that we're going to be using a dedicated SDSL line for the VPNs into the ISA box via a Cisco 828 router: PIX -- Web -- 828 -- ISA.
There are two possible ways to do this. The simplest would seem to be if we can "turn off" the routing on the 828 and leave the external IP on the ISA's ethernet interface, with the router acting purely as a connector. If this isn't possible, then I'll need to set the 828 to forward everything to the ISA box and vice versa, so as far as the PIX is concerned it's talking directly to the ISA box even though the public IP is on the 828.
I'd be very grateful if someone could tell me the simplest way to achieve this - my IOS knowledge is pretty simplistic! Thanks in advance.