Web server with static IP from cable provider

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http://serverfault.com – I have a subscription to 5 static IP addresses. I want to run a web server from behind a router. My network config is as follows: Server's local address is, has IIS running on it, port 80 and 443 (IIS is not my fault, had to be done) the server's ip address is static, the subnet mask is, gateway is, which is the local address of the cable modem / router / gateway thingy. All looks to be in textbook order as far as the LAN goes. I can get to anything on my LAN from any computer on my LAN, whether they have static IP or get it through DHCP from the cable mode ()