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Forum Discussion
CM1150V Not allowing network router to connect to Internet.
Today I bought a Netgear CM1150V Xfinity modem. (2nd of April 2020) Setup was easy. The firmware is the most up to date for today. The problem is the modem is blocking my routers from conecting to th...
FURRYe38 Yes you can hook up a router, but the Docsis 3.1 on Comcast blocks them in a normal router config. If you use the Access Point mode on your router you can use them all you want, but you will lose a level of security. This is because your router is assigning the IP address given to it from the modem. So, if your modem has a user control IP address of 10.0.0.1 and you run your router in Access Point mode all your devices are going to be 10.0.0.2, 10.0.0.3, 10.0.0.4, etcetera. However, if your router is running in a router mode you have an extra level of security. This is because a router in router mode is giving your devices a different IP address. So, your router asks your modem for an IP address. The modem gives it 10.0.0.2. Most routers have a user control IP address of something like 192.168.0.1. If the router is in router mode and not in AP mode it is going to give all your devices IP addresses of 192.168.0.2, 192.168.0.3, 192.168.0.4, ectetera. It is much harder to find a device behind a router when you're hacking someone's network. Because, the router user controls IP addrss might be set to 75.75.75.75 (FYI: this is comcast's DNS server IP out of Chicago) and all their devices might be running 75.75.75.76, 75.75.75.77, 75.75.75.78, etcetera. The router user control IP address can be anywhere from 1.0.0.1 to 255.255.255.254. There are programs that can scan for the IP addresses of the devices, but it's going to take a long time to get it done. If the person you are hacking is sitting behind multiple routers before you can get to their devices it's going to take some time to get to them. There are ways to drop the time it will take such as in PvP game play or through a messanger program on social media, but not everything you want to hack is going to be that easy.
Something you might check with other CC forums and see. I've seen many users post about having CC and use there own modems and own routers with little problems. I know this for sure as I've beta tested for NG had they ask us which ISP we use before we start testing. CC is one on a short list the NG asks us about. Seems like something maybe your doing or using isn't configured right. Again, if CC was doing this, there would be many users angry about not being able to use there own bought products on there network.
FURRYe38 Definitely not in my setup. Here is a little history on me. I'm 44 years old. My mom is a 37 year retired IBM employ. I used to take old IBM computers out of the trash at IBM and build them. I started doing this when I was 9. I started learning binary code when I was 11. I am a Cisco certified network tech and have been for 13 years. I finished my BA in computer science at WGU 5 years ago. I highly doubt my setup is wrong.
Well regardless of experiences, there seems to be something going on with your setup. There have been others in this forum that report using there own modems (NG or other Mfrs) with there own routers with CC ISP. Again, I for one see other users in beta testing that have CC as there ISP and have not reported or seen issues with CC ISP services. For a couple of modes we tested was the Orbi CBK40 and C7800. I would presume that maybe CC maybe singling you out and maybe doing something to block you or have cause to do this since your configuration maybe doing something nefarious or causing problems when on there service. You seem to be the only one having this issue and posting about it while others are not. Maybe at one point CC was blocking customer routers, however I've been doing this for many years and haven't seen complaints nationally about CC and blocking customer owned routers. I know that historically, CC has had very bad customer services and there ISP owned gateway wifi routers also were allowing there wifi router access to neighboring users to piggy back off there modems. Not sure if there still doing that or not. CC is not around my region, thankfully.
Seems like CC maybe only doing something with you and your configuration. Something you should contact the ISP about. Talk to a high level support tech and see why they are blocking your owned products. Only they can help you with this.
I am having this same problem. All was working when it was setup but was not getting the speeds that i was paying for. Called and CC told me it was my equipment, sent a tech our later and before he left, i was getting slower speeds and the wifi stoped working and I have not been able to get it back up. Even tried a new wifi device just to verify it wasn't my equipment. Everybody i have talked to at CC says that they can not help because it's not there equipment. (Do you want to rent ours?) What do you think my answer is....