SB8200

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?

Are the following events attributed to ISP or my SB8200, any help would be greatly appreciated Date Time Event ID Event Level Description 12/07/2025 23:12 2436694061 5 "Dynamic Range Window violation" 12/07/2025 23:12 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=(edited private information);CMTS-MAC=00:fe:c8:06:5a:40;CM-QOS=1.1;CM-VER=3.1;" 12/07/2025 23:12 73050400 5 "REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=(edited private information);CMTS-MAC=00:fe:c8:06:5a:40;CM-QOS=1.1;CM-VER=3.1;" 12/07/2025 23:12 2436694053 3 "SSH login failed from ." 12/07/2025 23:12

I purchased a refurbished SB8200v3.  I can’t connect it.  The Cox agent says it is still registered to someone else and she is unable to reset the modem so I can connect it to my account.  She referred me to Arris Support but I can’t find a phone number that is functional.  Anyone have a suggestion? 

Surfboard SB8200,  replaced our old Arris with a new one and it won't connect to my Kindle. I tried adding a network but it won't connect. 

I was looking at starting to use a VPN for all my devices connected to my wifi. It seems the best way to do this is if the modem supports either OpenVPN or WireGuard as a client (instead of as a server). Does anyone know if this is true of Surfboard modems? I do have a Google router connected which is what my home devices use for Internet connection.

Internet just stopped, but it’s not the ISP. The modem Power light goes green then off and all the lights cycle on and off. This happens repeatedly. I have unplugged, reset, tried a new outlet. Could it be the AC unit that’s not getting the power to the modem? I can’t contact support because the site won’t proceed past “Check Warranty” with the Model # & S/N on the device. Not being able to get ahold of Arris is obnoxious!

How do I know the password or username 

Front panel shows solid yellow lights indication stable connection (lights should be green/blue?), and router (ASUS) is fully connected and active (can be used with other modem). However, no internet connection available. I tried power cycling, but all lights return to solid with no connection available. 

About 30 days ago purchased a SD8200. About every 1 or 2 days the MODEM will lock up. I can’t access it and must power cycle it to get it functioning. Event log messages concerning.27/11/2025 23:34:06    notice    CM-STATUS message sent. Event Type Code: 5; Chan ID: 1; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(Edited private information);CMTS-MAC=00:01:5c:81:a0:6d;CM-QOS=1.1;CM-VER=3.1;27/11/2025 23:34:04    critical    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=(Edited private information);CMTS-MAC=00:01:5c:81:a0:6d;CM-QOS=1.1;CM-VER=3.1;27/11/2025 23:34:04    warning    RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=(Edited private information);CMTS-MAC=00:01:5c:81:a0:6d;CM-QOS=1.1;CM-VER=3.1;

My SB8200 modem has stopped working. When plugged in nothing happens, no lights. We just had a storm so we unplugged it before the power went out (which it did). Now that the electricity is back and we plugged it back in it is apparently broken.Do I need to get a replacement or is there a way to fix it?

My modem is making this awful high pitched sound. I have unplugged it into several different outlets and no luck. Help!!! This is super disappointing for a relatively new modem.