Have a Comcast SMC modem with one usable static ip address. I assigned it to a Netgate/ALIX box running pfSense 2.0. Double checked the ip address and subnet mask, both are correct. However, no traffic gets past the modem. The lan ip address scheme on pfSense is 172.16.xx.xx. Comcast lan is set to 10.1.10.1, so no conflict there. I can ping devices on the nat side of the comcast modem from the negate box. Had comcast switch out the modems, problem still occurs. If I switch pfSense to dhcp, it works, I can get online. Switch back to the static ip and I can't even get to google.com.