Arris Gateway and SURFboard Setup
Arris makes Comcast/Xfinity gateways (10.0.0.1) and standalone SURFboard cable modems (192.168.100.1). Complete login guide, IP passthrough setup, and signal level reading.
Arris Product Overview
TG1682G, TG3482G (XB6), TG4482 (XB7), CG7486E (XB8). Combine modem and router. Admin at 10.0.0.1.
SB6183, SB6190, SB8200. Cable modem only, no router. Diagnostics at 192.168.100.1. Buy to avoid monthly rental fee.
SBG8300, SVG2482AC. Combine modem and router. Admin at 192.168.0.1. Purchased, not leased.
Arris was acquired by CommScope in 2019. The SURFboard consumer brand continues under CommScope ownership.
Logging In to Comcast Arris Gateways
XB6, XB7, XB8 owners: Comcast disabled the web admin panel by default. Enable it first: Xfinity App > Wi-Fi > View Wi-Fi Equipment > Advanced Settings > Admin Tool Online Access > toggle ON. Then try 10.0.0.1.
Open the Xfinity app → Wi-Fi → View Equipment → Advanced Settings → Admin Tool Online Access → toggle ON. Wait 30 seconds. Skip this for non-Xfinity Arris modems.
Connect to the Xfinity gateway via Wi-Fi or Ethernet. Open a browser and go to http://10.0.0.1.
Username: admin. Password: password. If the password was changed, reset it via Xfinity app → Gateway Settings → Reset Admin Password.
Go to Gateway → At a Glance → Enable Bridge Mode to eliminate double-NAT and pass your public IP to your own router.
How to Log In
Xfinity XB6/XB7/XB8 gateways block browser access by default. You must enable it first in the Xfinity app before 10.0.0.1 will respond.
Open the Xfinity app → Wi-Fi → View Equipment → Advanced Settings → Admin Tool Online Access → toggle ON. Wait 30 seconds.
Connect to the Xfinity gateway via Wi-Fi or Ethernet. Open a browser and navigate to http://10.0.0.1.
Username: admin. Password: password. If the password was changed, go to Xfinity app → Gateway Settings → Reset Admin Password to restore the default.
Default Credentials
| Model | Admin URL | Username | Password |
|---|---|---|---|
| Arris TG1682G (XB3) | 10.0.0.1 | admin | password |
| Arris TG3482G (XB6) | 10.0.0.1 | admin | password (enable via app) |
| Arris XB7 / XB8 | 10.0.0.1 | admin | password (enable via app) |
| SURFboard SB8200 | 192.168.100.1 | admin | admin |
| SURFboard SB6183 | 192.168.100.1 | admin | admin |
| SBG8300 (modem+router) | 192.168.0.1 | admin | password |
IP Passthrough (Bridge Mode)
If you have a separate router behind the Arris gateway, you likely have double-NAT. IP Passthrough removes the gateway's NAT and passes the public IP to your router, improving gaming and remote access.
with admin credentials.
Go to Gateway > Connection > IP Passthrough.
Set Allocation Mode to DHCPS-fixed.
(shown by MAC address or hostname).
The gateway reboots and passes the public IP directly to your router.
Default Credentials by Gateway Model
| Model | Admin IP | Username | Password | Notes |
|---|---|---|---|---|
| XB8 (TG4482A) | 10.0.0.1 | admin | password | Wi-Fi 6, DOCSIS 3.1 |
| XB7 (TG3482G) | 10.0.0.1 | admin | password | Wi-Fi 6, DOCSIS 3.1 |
| XB6 (TG3492LG) | 10.0.0.1 | admin | password | Wi-Fi 5, DOCSIS 3.1 |
| SBG10 (modem-router) | 192.168.0.1 | admin | password | Wi-Fi 5, DOCSIS 3.0 |
| SB8200 (modem only) | 192.168.100.1 (diagnostics) | N/A | N/A | DOCSIS 3.1 |
| SB6183 (modem only) | 192.168.100.1 (diagnostics) | N/A | N/A | DOCSIS 3.0 |
| TM822G (cable modem) | 192.168.100.1 (diagnostics) | N/A | N/A | DOCSIS 3.0 |
Troubleshooting
Enable the admin tool in the Xfinity App first. Go to Wi-Fi > View Wi-Fi Equipment > Advanced Settings > Admin Tool Online Access and toggle it on.
Look for a separate "Admin Password" on the gateway label - it differs from the Wi-Fi password. If you changed it and forgot it, hold the reset button 30 seconds to restore factory defaults.
The modem has not yet registered with the ISP. Wait 3 to 5 minutes for the DOCSIS registration process. If levels stay at zero, check all coax cable connections and contact Comcast to re-provision the modem.
Community and Support
These communities have thousands of solved threads for every configuration scenario.
Frequently Asked Questions
Should I buy a SURFboard instead of renting from Comcast?
For most people, buying pays off in under a year. Comcast charges around $14 per month to rent their gateway. An Arris SB8200 DOCSIS 3.1 modem costs about $100 to $120 and you own it outright. You also get full unrestricted admin access at 192.168.100.1 without ISP limitations. Check Comcast's approved modem list before purchasing to confirm compatibility with your service tier.
What do the T3 errors in the SURFboard event log mean?
T3 timeout errors mean the modem sent an upstream ranging request and received no response from your ISP's head-end equipment. Common causes include high upstream noise, damaged coaxial cable, corroded connectors, or a failing splitter in your home wiring. Check all coax connections, remove unnecessary splitters, and call your ISP for a line check if T3 errors are accumulating rapidly.
Disclaimer
For educational purposes only. 19216811.org is not affiliated with Arris International, CommScope, or Comcast. Arris, SURFboard, and CommScope are trademarks of their respective owners.