Is this a new connection? I was not aware that Comcast allowed that configuration. I was told that you had to use an SMC gateway in gateway mode in order to get static IP addresses.
Or are you confusing not using the SMC's NAT with bridge mode. Unfortunately, that is something that a lot of uneducated (and/or unethical) Comcast CSRs seem to do, and their referring to doing that as bridge mode in turn confuses a lot of customers.
Well the operating mode says RG, which is gateway, but I am not using the Nat'ed addresses. Its local DHCP says 10.1.10.1 and thats the address I used to get into the web interface, but I use our real IP addresses on the PIX, and they pass thru all traffic, I did see that Disable Firewall for True Static IP Subnet Only &
Disable Gateway Smart Packet Detection have check marks. Strange thing , we actually can use all six ip addresses! (with a wireless router attached to one of the ports directly, not on the otherside of the PIX, I get the .30 address. .25 thru .29 pass to the pix just fine. I have the pix configured static and use a windows box for our lan side DHCP configs. Works like a champ.
Is this why peeps are complaining about the gateway mode, are they using some cheeseball router and not setting up the real IP addresses using static configs. Never use DHCP to get an IP address from a SMCD3G, just put in the real ip address into the router. and then Nat your network. Much simpler way to change the WAN side configs without ever changing the LAN side. (I guess they dont want to use a REAL router that actually protects your network.)