Visitor

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2 Messages

Wednesday, April 15th, 2026 7:10 PM

Coax-to-Fiber Install with own UniFi router - Bridge Mode?

Our HOA convinced Comcast to upgrade from Coax to Fiber in our community over a year ago and I finally have an install date (Sunday morning) scheduled for my property.

I'm an IT professional who 100% manages my own UniFi network and my UCG Max router/firewall is currently connecting directly via my own cable modem (i.e. "bridge mode").

How can I make sure the scheduled installer is prepared for my setup? I'm hearing Xfinity can't (doesn't?) provide an "ONT only" option and I'll probably be given an "all-in-one" fiber gateway that will need to be configured for this, disabling any built-in networking/wifi, etc.? I also hear some of the models (XER10?) don't even currently support bridge mode? I also want to make sure my fiber install is able to support the 2.5GbE WAN throughput my gateway is capable of.

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Expert

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118K Messages

1 month ago

If you do get the XER10, here is some info about putting it into a DMZ as a workaround for avoiding double NAT issues so that you can use your own firewall appliance;

https://www.google.com/search?q=xer10+dmz&rlz=1C1CHBF_enUS937US937&oq=xer10+dmz&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQABjvBTIHCAIQABjvBTIHCAMQABjvBTIKCAQQABiiBBiJBTIHCAUQABjvBdIBCjI4NTIwajBqMTWoAgiwAgHxBQw-kMhW0uJA&sourceid=chrome&ie=UTF-8 

(edited)

Official Employee

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4K Messages

29 days ago

Hey there, @nelsva, thanks for reaching out through Xfinity Forums regarding your installation. Were you able to get all of your installation concerns resolved? Do you still have any questions regarding the setup?

Visitor

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2 Messages

Not really... I would prefer to avoid any "workarounds" and am frankly a bit surprised that an "ONT only" installation isn't an option. I just wish there was some way to make sure whoever is scheduled to come out on Sunday morning is best prepared for my situation which will be quite different than all the other elderly people in the HOA they're working with. In many ways I'm making their job MUCH easier by already handling all my own internal networking. Just terminate my new fiber and hand me a public IP address; that's all I need. ;)

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