5 Messages

Friday, September 12th, 2025

Want some advices on modem

I recently upgraded to 300 mbps plan and Xfinity sent me an XB7-CM modem. But now I am still using with old SB6183 modem and my own router. and am hesitant to switch to the new XB7-CM because I don't want to lose the following functions provided by my current router. Can someone tell if XB7-CM supports them?

  1. Dynamic DNS
  2. VPN Server (I have a VPN server on my current router working with Dynamc DNS)
  3. DHCP Reservation for specific devices
  4. Separate Wifi SSID for 2.4GHz and 5 GHz
  5. Port-forwarding
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Accepted Solution

Official Employee

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2.2K Messages

1 month ago

Thank you very much for the question. The  XB7 modem does not natively support hosting a Dynamic DNS (DDNS) VPN server, as it lacks the necessary built-in VPN server functionality and DDNS client options for this purpose. To set up your required features, you will need to place the XB7 in a bridge mode and use your own router for DHCP reservations, separate Wi-Fi SSIDs, port forwarding, and Dynamic DNS by configuring its VPN server. 

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