SB8200

This is very strange. My ISP is Spectrum. It took them an HOUR to provision this modem to connect it to the internet. It works. It’s worked for a week. But we cannot even VIEW the login page. It times out. Nothing has worked. 20 second factory resets, blah blah blah blah. I’m an IT professional. I believe this modem is a dud. The app is completely useless. It doesn’t even let me log into the app, so don’t even try to tell me to go there. To clarify, I try to log into the IP that the instructions say to go to, and it times out. This is with ethernet directly into the modem, no router, etc. Firefox, Edge, and Chrome all time out. It says the modem is busy and may not have access to the internet. But it does. The internet works fine.

​@SURFboard Support ​@SURFboard Moderator Hi, I’m currently involved in a dispute with my ISP over this modem. More info on that below, but here’s the main issue:I came here to reach out to support for information on the modem, and could not verify the warranty. I entered the model number and serial number exactly as the label shows, with and without spaces, uppercase and lowercase, etc.If I try a serial number for an older modem, it comes up and shows the warranty status. However, but the SB8200 does not show up. It was purchased new from Amazon with Amazon.com as the seller, not through a third party. More info about the ISP dispute:Signed up in 2023 for 1Gbps service Promo included a free modem/gateway since it required a newer DOCSIS version Activated the ISP gateway Bought my own modem (n

I need help and I can’t find a phone number to contact anyone.  I’m trying to sign into my router.  I’m reading everywhere online that I should be able to type my router’s default gateway number into the search bar and hit enter but it keeps saying webpage not available.  Any suggestions?  Thank you.  I have the Arris/Surfboard Router SB8200Default Gateway number is 192.168.4.1

Can’t get Arris to connect to TV

This is likely the same issue I’m seeing in several posts, but my lights are cycling a little differently and there is an odd sound coming from the model.Regardless if I just rebooted or it’s been on for a while, my modem will show the power light, then flash the uplink light, then seem to power down and do it all over again. While this is happening, I hear a screeching sound coming from inside the unit (almost like an old phone modem). I’ve tried the reboot, the factory reset, etc, but every time, it continues to do the same thing. This all occurred after a long power outage, followed by a long Comcast outage. I have a surge suppressor on the plug, but who knows if that really helps.Is my unit borked?

For the past couple of months, my internet speed has been irregular and sluggish. Lately it’s barely coming through at all. My internet provider said I need to check that it’s not a modem issue before they send someone out again.Is there a way to check if it’s a modem issue or a wifi issue?

Hello,I recently purchased an Arris SB8200v3 modem because my prior modem seemed to be failing (less than 10Mbps download speeds - tech came out to check and said the cable was fine).I activated the new modem with Astound, but since then I have not gotten more than about 35Mbps download speeds. I’ve done several hard resets (methods: unplugging power, pushing reset button, both when coax connected and disconnected from the modem), but nothing seems to be working. I have a 1Gig plan with Astound, and, in the past, generally, I’ve had very fast speeds. I’ve tried to troubleshoot using information from other topics/websites, but nothing is working. Is my new modem defective? Here are the specs:

My ISP (Sparklight) informed me that their firmware is only for V1 devices with version AB01.02.053.05_051921, and their notes specifically state it cannot be used for V2 or V3. I need to obtain the firmware from Arris. My current firmware version is TB01.01.001.05_012122_212.0A. Could you please advise where I can get the latest firmware for my SB00DAD38200V2RT? thanks

One year old modem, worked fine until two months ago, then dropped every so often. Three days ago it dropped and will not connect on reboot.  Called Cox, they declared it not working and gave me a loaner.  Tried swapping back the SB8200 and it still has the same problem.  Appears to boot correctly, but seem slower than I remember.

I lost the username/password for my SB8200.  I’ve tried several suggested ways to factory reset it, but it does not reset the username/password back to the default.I’ve tried:power cycling it pressing reset button until front lights flash - 10 seconds. pressing and holding reset button for 30 seconds unplugging co-axial cable, and performing the above steps unplugging co-axial cable, and ethernet cable and performing the above steps unplugging co-axial cable, pressing reset for 30 seconds, holding reset and unplugging power for 30 seconds, still holding reset and plugging in power for another 30 seconds leaving it totally unplugged overnight for 10 hoursNone of that has worked.  Are there other options?  It is under warranty until 2027.  It’s never been registered with my ISP.  Arris online chat never appears to be online, I’ve been trying for days.

I need to disable sip alg on my modem i have the arris sb8200

I have had trouble with my modem not accessing the internet each light would flash and go solid until the internet light, when it tries to look for the internet it flashes faster than the others and then resets back to upload a couple times before going back to download and trying it all over again I have factory reset it and contacted spectrum do I need to contact someone and then have customer support reset it themselves?

I have seen all the other threads about how to access the modem and tried them all.I tried ip addresses 192.168.100.1, 192.168.1.1, and 192.168.0.1 with no success.I have tried connecting directly to the modem. I have tired disconnecting the coax, being directly connected, and it loading the login page but the moment i connect it back to the internet i can no longer access the login page. is there something my ISP is doing to prevent me from logging in? I really need to get into that data but I am out of ideas how. 

The SB8200 is not listed as a choice on initial setup. Help!

Bought this device in June 2025 this morning it has died. Contacted Optimum to see if there was something they could do. They couldnt see the device. It will power on and then flash blue up/down stream lights and then reboot and start the cycle of flashing again.  Optimum reconnected my SB6183 and it is working fine.  When putting the S/N in it says  “We were unable to locate your serial number. Please check your model number and serial number and try again. This information can be found on the label in back or on the bottom of your device.”  

I have  SN8200. lost Internet I have reset it been in touch with service provider. They have tried to reset it. The power light comes on, but the Internet lights do not come on they flash intermittently, but do not stay on. I have reset it to factory default powered it down checked with my service provider Internet to my house is fine. Just making a squeaky noise like it’s trying to connect, but nothing is happening

need to reset PW

SB8200 failing but website says serial number not foundMy SB8200 purchased in November 2021 keep dropping the connection since Xfinity upgraded things in the neighborhood. The connection keeps dropping. Xfinity says there is no outage. I've already upgraded the coax and splitters, etc. Still keeps dropping. It was running PERFECTLY FINE without a problem until they updated the neighborhood (Up to 10G). I cannot contact customer support due to the website saying my serial number cannot be found. I have tried entering it multiple times in different formats with no luck. To fix it, I just disconnect and reconnect the coax, and power cord, Then I am running fine for a day or so. Thank you! 

Hi everyone, I’m currently working with an Arris SB8200 cable modem and need some technical guidance. I'm trying to automate a WAN reset routine for my home network, but I’m hitting a wall with the device’s firmware behavior. Has anyone here worked with these modems to enable remote reboot capabilities or bypass the authentication requirements? Any advice on scripting this or alternative hardware solutions would be greatly appreciated.

SB8200 will not power-up, no lights as of yesterday. Purchased Nov 2023. Power adapter had gone bad about 6 months ago. Power adapter reads that it’s giving out voltage, but once more, the modem is not doing anything.  

I’ve had two Ethernet ports activated on my SB8200 for a number of years. My ISP (Astound) says I’m still provisioned for two IP addresses. As of last evening (12/21/25), I only get Internet access through one address. Power cycling the modem sometimes results in it activating the other Ethernet cable connection. The lights on the cable modem flash showing “traffic” on both connections but only one at a time has an actual internet connection. I’ve bypassed the issue for now but need advice if this is possibly a modem issue or if I need to go back to the ISP again (15+ wait time on phone for support)?

I have had the same issue. It worked well for a few days no issues and now we have to keep powering down modem and restarting it for the connection to come back. There are no issues with my internet provider and have never had to restart modem at least twice a day.

Dear Arris,Many manufacturers of cable modems provide software control to reboot modems within their devices’ GUI.This has always been a helpful option, but gaining significantly more importance with the increased adoption of home automation systems.  It is becoming critical for users to establish automation routines to resurrect WAN connections to the internet after an ISP network, or electrical outage.Your SB8200 has the ability to reboot on command.I know this because:ISP help desks (e.g. Spectrum and others) can reboot the SB8200, and some even allow users to reboot their modems from their user mobile app You (or my ISP) altered the firmware, hiding the code in the modem’s GUI configuration page by commenting out the “reboot” button - AND - the onboard script checks for a user’s ID# if the form is submitted without using the form on the configuration page.Here’s the code you commented out, so it no longer dis

ordered last saturday, with faster shipping. my card was charged. i did not receive a confirmation or any tracking information. there is no way to contact anyone about this on the store website (really, just a ‘do not reply’ email ?!?)please respond: https://community.surfboard.com/members/surfboard-moderator-593 as you have to others with the same problem….what is going on ?

I assumed when I bought this that I could run two ethernet cables from it at the same time because it has two ethernet ports. Just found out that is not possible. One can only run one at a time. Without having to physically switch cables, is there such a thing as a modem switch to multiple devices (i.e. desktop, router, personal server, etc.) without having to move cables?