Comcast DHCP, No Internet

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Jeffrey Crowley

• December 17, 2022 15:07

I have a new Gold Plus in Router Mode with CenturyLink fine in port 4, but cannot for the life of me get Comcast to work in Port 3. It is using an Arris S33 modem and not directly to an Xfinity gateway or anything and works fine when routed to a modem and not to the Firewalla. Would love any suggestions

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  Michael Bierman

  • December 17, 2022 20:05
  • Edited

  1. Did you try both ethernet connections? from the modem?
  2. Did you try connecting to the working port 4?
  3. Did you set up Port 3 as a WAN?
  4. Are you running in load balancing or failover mode? 
  5. What does the modem admin page say in terms of connection? 
  6. If it won't work in port 4 I'd contact Arris 1-877-466-8646. 

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  Jeffrey Crowley

  • December 17, 2022 19:23

  I’ve tried all combinations of port 3/4 and the 1/2.5 ports on the arris. The modem is connected fine to internet when I hard line directly to it. It is also connected fine when I connect it through a TP-Link archer 11000

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  David Rothenberger

  • December 18, 2022 02:08

  Try to factory reset the modem if it has such an option. That's worked for me in the past with Comcast, albeit with a different modem.

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