We currently have a Cisco ASA on a range with only two usable IP addresses. The Cisco has
126.96.36.199 and the BT NTE box (for the leased line) has
Now we want to split this line across two firewalls, so the existing ASA and another ASA 5510, so both firewalls have access to the line . This will be done via a switch - i.e. NTE Box --> Switch --> Link to each firewall. The ISP has sent has two additional IPs but in a totally separate subnet for the new firewall.
Now the ISP have apparently routed the above range
188.8.131.52 which is the interface on the current firewall.
But on the new firewall, we assign one of the above IPs to it's WAN interface, what do we assign as the default gateway for this interface? The IP of the NTE box? How does this work?