To make sure your email request gets to the correct Actiontec Technical Support representative please select the from one of the options below. I ran into the same issue with my modem through CenturyLink, an Actiontec C100A. I was able to telnet into the modem and use the command line to edit my iptables. As CenturyLink and Qwest merge companies, we are working hard to combine our systems. By supplying your service address zip code we will be able to get you to the. ii Actiontec DSL Modem User Manual 6 Configuring Internet Access Controls 41 Accessing Internet Access Control Screens 41 Services Blocking 42.