We've got a Cisco PIX 516e currently connect to our LAN and to an ADSL internet router and have just got a new fibre connection from our telco.
The Telco have a switch for us to plug the wan interface of the PIX into and have given us an ip address and a next hop IP. The ip address they've given to us however is not the same as the 2 new public ip addresses they've given us so I'm a little confused about how I configure the Cisco.
To clarify: (example ip addresses used) Ip for wan interface on Cisco is: 10.10.10.1/24, next hop (or default gateway) is 10.10.10.2/24. Neither of these addresses will be visible to the web, they're Telecom internal network addresses. We've been given 22.214.171.124 and 126.96.36.199 as public IP addresses to use (to advertise to the web for smtp traffic, vpn connections etc). Can I put the 188.8.131.52 address on the WAN interface of the PIX as well as the 10.10.10.1 address? If so, how? How do I ensure traffic flows OK?