I am going to replace my ATT DSL service with ATT U-Verse. Currenty, I have a Cisco Pix 501 firewall and a Gigabit switch that connect less than a dozen computers and other ethernet devices to the Internet. I currently have 5 static IP addresses assigned to my DSL service. I got them so that I could run my own web server behind the firewall. Since then, I've moved my web site to an external hosting service. My Cisco Pix 501 is currently configured as follows:
name 192.168.1.1 pix_inside
name 999.999.999.248 pix_outside
ip address outside pix_outside 255.255.255.248
ip address inside pix_inside 255.255.255.0
When I switch to ATT U-Verse, do I still need a static IP address to support my Cisco PIX firewall appliance? Please explain.