Cable Modems & Gateways

Discuss Cable (C and CM series) modems and gateway products.

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Discussions

CAX80 v5.1.1.8 Firewall Blocking HTTPS API Traffic - DMZ Confirmed
Hi all, I'm experiencing a firewall bug on my CAX80 (firmware v5.1.1.8) that's blocking HTTPS API calls to legitimate services (specifically api.anthropic.com for Claude AI/Claude Code). Symp...
Solved
brief-actuator
Dec 11, 2025 Place Cable Modems & Gateways
cax80
125Views
1like
10Comments
CM1100 and Mesh 6 system not working after power failure; all lights working fine
Greetings! - CM1100 modem and MR60 mesh router (2 satellites) installed June of 2021. Comcast is my ISP in the PNW and is relatively reliable historically. - Over last 4 years, I've had to p...
Solved
CarrieF
Dec 07, 2025 Place Cable Modems & Gateways
cm1100
138Views
0likes
18Comments
Nighthawk cax30 Control panel access failure.
I've successfully registered the MAC address with Xfinity and now have internet access, however 192.168.0.1, 192.168.1.1 and "routerlogin.net" do not work on ANY device. "Server not found" is all I'm...
Solved
Riversiderepeat
Nov 24, 2025 Place Cable Modems & Gateways
not listed
73Views
0likes
8Comments
CAX30 UPnP error with multiple Xboxs
Setup: I have a CAX30 acting as modem and router. UPnP IS toggled on in the gateway utility. Verified latest firmware installed. 2 (sometimes more) xboxs connected via wireless. The issue is each...
Solved
zachya
Nov 18, 2025 Place Cable Modems & Gateways
not listed
60Views
0likes
5Comments
CAX30 cable connection status: poor
I'm not too familiar with how routers work and what not. Is this issue on my end or the ISP? How would you fix this issue? Frequency start Value This field bel...
Solved
destrosed
Nov 13, 2025 Place Cable Modems & Gateways
not listed
84Views
0likes
4Comments
CAX80 lights on but no internet
Hello, I’ve checked over everywhere I could find because a few hours ago my lovely CAX80 decided it wanted to start cutting out about every 5-15 minutes. The lights on the device stay on but I get cu...
Solved
Kingsshadow
Oct 27, 2025 Place Cable Modems & Gateways
cax80
119Views
0likes
9Comments
AX4200 Limits
I have an AX4200 with one satellite. Only my download light is on. I am no longer able to consistently stream Amazon Music on multiple speakers. I have a 1 GIG download, but 50 WIFI devices connected...
Solved
thepadlos
Oct 22, 2025 Place Cable Modems & Gateways
cbk752
116Views
0likes
8Comments
C3000-1000NAS
Have a N300 Wi-Fi Cable Modem Router that has been working fine for many years. Yesterday had power outage that lasted about 5 minutes. When power was restored, lost our Wi-Fi and NETGEAR Genie scree...
Solved
fishinpole84
Oct 14, 2025 Place Cable Modems & Gateways
not listed
78Views
0likes
6Comments
My CAX80 started acting up
My CAX80 started acting up yesterday as well. No idea what changed but devices on 2.4 Ghz would work fine. Anything on 5 Ghz was sporadic connecting to the internet. Very frustrating when you work fr...
Solved
sheepherda
Sep 09, 2025 Place Cable Modems & Gateways
cax80
77Views
0likes
5Comments
CM2050V - Latest Firmware Preventing 2.5 Gbps Passthrough on Ethernet Port
Hello all, and specifically to the moderator, I'm reporting a potential firmware or hardware version defect where the native Ethernet port fails to pass through 2.5 Gbps speeds to the LAN, with f...
Solved
Ace_Card
Sep 06, 2025 Place Cable Modems & Gateways
cm2050v
157Views
0likes
10Comments