SBG8300

Called Centurylink and they told me I had to contact you to update the device to get it registered on their system. They told me to give you the code PTM tagged 201

I have a Arris SBG8300 DOCSIS3.1 Modem Router. I had separate bands for WiFi, one 2.4 GHz and other 5 GHz. Both used to show up on wifi settings for connection. For the past two days I don’t see 2.4 GHz band anymore. I seldom see the 2.4 GHz band but when I try to join that network, I get the message “Couldn’t join network”. I have smart devices which use 2.4 GHz band and since 2.4 GHz is no more available, all the smart devices are useless. I have tried restarting the modem. I have also done a factory reset but 2.4 GHz band does not show.Any help is appreciated.

Cox tech support isn't helping.  Need to know if I'm wasting my time using 8300 modem with XP.

Should the SBG8300 support VPN or is there a way to add it?

The 2.4 network is not working on my new AC2350 wifi 5 router/modem.Network occasionally appears but can’t connect to it. Frustrating because some of my devices can only connect on 2.4 and there is no reliable connection. Need to return it?

my internet is going in and out for min or two at a time.why would this be happening? need some help asap

Hi all,I have a SBG8300 for the past year now.lately my internet will drop or not work at all & comes I we time. I’ve had about 6 technicians at my residence come here for the last 5 weeks & they can’t seem to find the problem. I have optimum internet.has any one else had issues like me and/or have you had any experience with this modem & maybe suggest an alternative cable modem I only have the internet plan through optimum 

The Wi-Fi Freen light is blinking. 

Xfinity has activated my new SBG8300 modem and I have tried the two different surfboard apps to connect to but they are not connecting to my wifi. I need to change my wifi password.Thanks for your help.As a side note, I’m not noticing any improvement with my new modem. My video cameras are slower to load. Ugg.  

Hello - I have Xfinity internet and I’m using the SBS8300. In general, I have good signal and no troubles streaming or gaming, but the signal is poor in the back of the house - about 30 feet away. It’s not a big house, but there are a few walls in between. Which product can I add to improve the signal strength in that area? Thanks!

I have a few Smart Bulbs and Outlets.  I just bought an Arris SBG8300 Modem/Router and I can not get any of them to connect.  What do I need to do to get them connected?  Tanks for your Help!Terry B.

We turned off WIfi or put in bridged mode to set up Eero mesh network and it isn’t working need to turn it back on. Can this be done

I bought an Arris SBG8300 a couple/few years ago so I wouldn’t have to lease a device from the cable internet providers. It’s been fine up until needing to use the port forwarding feature. I followed the manual and online instructions but either the port forwarding page never loads at all (is greyed out with a spinning wheel of doom forever -this happens on multiple PCs, hardwired and wireless, and I’ve tried five different current browsers: Edge, Firefox, Chrome, Safari, and Opera), or it loads but not completely (the option to select a device never appears and there’s no save button (got this in IE11). I’ve tried http and https. I’ve disabled UPnP. I made sure a bunch of other settings I don’t use are disabled (DMZ, port triggering, etc).  there were a couple other similar posts on here and the answer was to try the Surfboard Central app, and I didn’t even know there were apps for this. I have always controlled my routers and modems and network devices via local compu

I have done everything that has been suggested in these comments and the Arris Surfboard app will still  not accept my login username and password

How do I connect an extender to the SBG8300 modem?

I noticed that in my firewall logs there are a lot of attempts.  Not sure if this is normal or not but I have also been having issues with upload packet loss where I usually have 1% or less than 1% upload packet loss.  Sometimes it can be worse, however I thought maybe if there is a lot of resources used on the firewall, then some packets may be getting dropped.  Been having this issue for a while now.  I use ethernet and also got a new line going to my house.  I saw online that the SBG8300 has a puma 7 chipset which is defective, however I’m not sure if this is linked to my 1% packet loss at all.   Here is an example of my firewall log: (this is just from a few hours after i hard reset the modem from the button on the back) FW.IPv6 INPUT drop 522 attempts 11/24/2023 05:11:23 Firewall Blocked FW.IPv6 FORWARD drop 273 attempts 11/24/2023 05:05:47 Firewall

I forgot my password for the arris app and the Wi-Fi. Can I reboot the system and start over

What could be the problem. I thought this router/modem was compatible for use on xfinity. I can go 2 or 3 days and no problems then I can have 2 or 3 hangups. Rebooting my computer normally fixes the problem. What could be causing this? Sometimes it hangs up and the mouse doesn’t work and other times the screen hangs up when online but I can use the computer off line. 

Been having around 1% packet loss for a while now and I think it may be the modem/router.  I have ethernet and got a new cable (my ISP is Xfinity).  They told me that “a few percent packet loss is normal” which doesn’t make sense because I am hard wired.  Is the PUMA 7 chipset inside causing this?Attached below are 2 pictures of a packet loss test.👍Thanks I would appreciate any help 20 second test, 2440 and 2456 bytes, 300 pings a second. 3 minute test, 142 and 158 bytes, 30 pings a second. 

I called the number and it said they were closed,  it's not midnight!!!   Sunday through Saturday business hours?  JUST DAY 7 DAYS A WEEK!!!! Anyway, so the setup app doesn't work because I have a newer version of android, so I typed in modem IP and that doesn't work on either of my android phones..  so now what?  Xfinity has been no help either, but at least they are actually open.

I’ve had the arris sbg 8300 modem router for about a month. Lost internet connection a few days ago and after connecting again, I only have access to YouTube and google on my laptops and have not internet access at all on my phone. (Phone shows it’s connected but can’t access a variety of websites). My 10 year old tablet has no connection issues.  I have done a hard reset, defaulted to factory settings, and unplugged/plugged the modem.  What else can I do? 

I just started my XFinity service and I purchased an SBG8300 for both my modem and router. I am not able to connect to any websites besides google, youtube, instagram etc. I realized that I am only able to connect to websites with IPv6. When I log into my modem, I see that the WAN IPv4 is 0.0.0.0 and the WAN IPv6 is something. I believe I am not receiving an IPv4 and so I cannot use many websites. If I check using whatismyip, I don’t get any result for IPv4, but I do for IPv6. If I use the command prompt to ping google, it works using ping -6 but not using ping-4.Is there anything on the modem end that could be done to further troubleshoot or is this an issue with my ISP?

I have an SGB8300…I believe it is a modem & router?  I wanted to see if I could connect a mesh network to it in order to extend my Wi-Fi into dead zone or poor signal zones of my home. Is this possible? 

I just bought this sbg8300 and replaced my cox panoramic modem. I bumped my speed to 500 mps. I canceled all my cable boxes and now do all streaming. I use 7 firesticks for streaming.  Normally no more than two at one time. Every 3-4 days the screen freezes up and the internet connection drops. Unplugging the modem for 60 seconds and restarting again connects everything again. I had no such problem with the cox panoramic modem. But cox was charging me 14 bucks a month to rent it. I don't do gaming at all. When I reset the modem I check to see if its hot but it doesn't feel like it. I do have TPlink deco attached to one port to extend the signal throughout my house. But that doesn't seem related.  I really want get this fixed so I don't have to keep resetting the modem to cox.  

One day my SBG8300 lost internet connection from Xfinity, Xfinity told me it was the modem, so I bought a new SBG8300. It also had no internet connection. Xfinity then told me they updated the area network and the SBG8300 was no longer compatible with Xfinity. I needed an update for the SBG8300.I looked and there is no software update for SBG8300. Is there a solution for this?