Hi all,

I know this is a dumb-ass question but I've read the FM (including the new Book of PF 2) and there is a basic something I still don't understand about CARP.

Right now I have a small network with 1 static IP and 1 firewall. I have a cat5 cable running directly from the cable modem to the $ext_if of the firewall. I want to replace my 1 firewall with a pair of new-to-me identical 1U servers with 4 em interfaces

I understand that I'll need to drop a small switch between the cable modem and the redundant firewalls but what I don't understand clearly is how many real, external static IPs I'm going to need. Page 120 of the Book of PF 2 has a diagram that makes me think I'll need 3--carp0 on each firewall gets the IP I have now, and the $ext_if on each firewall gets another static IP each.

Is that correct? Obviously I don't want to buy a couple more static IPs if I don't need them.

Thanks in advance!

Jeff Ross

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