What is the default IP address for Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM)?

The factory default IP address for Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM) is http://10.0.0.1.

What is the default username and password for Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM)?

The default username is "admin" and the default password is "password".

How do I factory reset the Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM)?

Locate the small Reset pinhole on the back panel of the Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM). Press and hold it with a paperclip for 10-15 seconds while powered on until the LED lights cycle.

Xfinity (Comcast) Modem Gateway Wi-Fi 6E (802.11ax) AXE8000 DOCSIS 3.1

Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM)

Flagship DOCSIS 3.1 multi-gigabit cable internet gateway across the United States

Open http://10.0.0.1 ↗

Illustration, not a product photo

Gateway IP

10.0.0.1

Factory Username

admin

Factory Password

password

Technical specifications

xFi Gateway Series

Manufacturer	Xfinity (Comcast)
Product Series	xFi Gateway Series
Device Class / Category	Modem Gateway
Wireless Standard	Wi-Fi 6E (802.11ax)
Speed Rating	AXE8000 DOCSIS 3.1
Ethernet & Fiber Ports	1x 2.5G LAN/WAN, 3x 1G LAN, 2x Telephone RJ11, 1x Coaxial Cable
Routing / Firewall Throughput	Multi-Gigabit DOCSIS 3.1 & 4.8 Gbps 6GHz Wi-Fi
Default Gateway URL	http://10.0.0.1 ↗
Operating System / Firmware	RDK-B Broadband OS

How to log in to your Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM)

1 Connect Your Device: Plug your PC into any LAN port on the Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM) using an Ethernet cable, or connect to the default Wi-Fi SSID printed on the router label.
2 Navigate to Gateway IP: Launch your web browser and enter http://10.0.0.1 into the address bar.
3 Enter Factory Credentials: Enter username "admin" and password "password", then click Login.
4 Configure Security & Password: Follow the on-screen Quick Setup wizard to customize your Wi-Fi SSID, set WPA3/WPA2-AES encryption, and establish a new master administrator password.

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Frequently asked questions

What is the default login for Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM)?

The default IP address is http://10.0.0.1, default username is "admin", and default password is "password".

What ports and speeds does Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM) support?

The Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM) is equipped with 1x 2.5G LAN/WAN, 3x 1G LAN, 2x Telephone RJ11, 1x Coaxial Cable with an overall speed rating of AXE8000 DOCSIS 3.1.

How do I reset my Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM) to factory settings?

Press and hold the physical Reset button on the Xfinity (Comcast) xFi Advanced Gateway XB8 (CGM4981COM) for 10 to 15 seconds until the power LED blinks, resetting all settings to factory default.