Basic Cisco/Router question

[diffy]

Hi

I have recently started at a company use Cisco firewall kit which I have little knowledge of (hence the basic questions). This is the scenario …

Office A have a PIX 515 firewall and Office B have a PIX 501 firewall. There exists a site-to-site VPN between the two so that Office B can pickup email.

Office B are changing ISP. The new ISP will be providing them a new router with subsequent IP addresses such as the router and internet facing address.

1. Is this just a case of editing IP addresses from the PIX device manager on Office B to the new addresses and similarly any references to these addresses on the Office A PIX device manager?

2. As there is a VPN between both firewalls can we again just change the old IP addresses to the new or should we run through the VPN wizard from office B.

I don’t know if I’m going in the right direction with this but any help would be much appreciated

 

[lgarner]

The vpn should work simply by changing the crypto peer address on A to point to B's new address.

 

[NetworkGhost]

Doing a swap of IPs will work. Make sure you get all of your ACLs though. I, not a fan of the PDM but I believe it would be eaier to do this through command line.

 

[diffy]

Thanks guys if I can swap the IP's in the PDM then thats good for me.