I replace my Linksys befcmu10 , with a Cisco -lrb- Linksys -rrb- dpc3008-cc . I first have to remove my Cisco ASA5505 firewall and connect my laptop directly to the dpc2008 . when you browse to anyweb page , Comcast will redirect you to they registation page . after I enter my comcast account number and phone number -lrb- have they ready -rrb- , registration take about 8 minute . to get my firewall re-connect , I have to power cycle both the modem and the firewall . the total down time be about 10 minute .