Hub 3 Modem mode started blocking certain IPs
Hi all, I have a Hub 3 and I've run it in Modem mode for years so I can use Google Wifi as my router/mesh. I'm on M500 and my service has been very stable the whole time I've used it. Yesterday (1 June 2024) I started having connectivity issues from all the devices on my LAN. Specifically, certain external sites couldn't be reached (including but not limited to) Epic Games, Ubisoft and even the website of my own company. The connections timed out rather than being actively blocked with an Essential Safety notification page. Not just web traffic was timing out, ssh connections to my webserver were also dropped. These sites were reachable via mobile data and from other friends' networks (including someone also on VM) so the issue was specific to my network. DNS resolution was working properly but even ssh directly to my server's IP timed out. Puzzlingly, most other sites continued to work normally though sometimes a bit slowly. No line issues or works were showing when I ran VM's test so I followed the advice to reset my Hub 3. I did this and noticed that when my laptop was wired to the freshly reset Hub 3 (in Router mode) I could once again connect to the previously blocked sites. I set the Hub 3 back to Modem mode following the correct procedure (removing the ethernet cable, waiting for the Hub to finish going to Modem mode before reconnecting my Google Wifi Router). I was dismayed to find the exact same connectivity issues even after the Hub reset. I repeated the Hub reset and also factory reset my Google Wifi router before going through the same procedure to get the Hub back into Modem mode. Same issue recurred as soon as the Hub was in Modem mode. Don't know what changed with the Hub 3 or on VM's network to cause this issue after years of Modem mode working flawlessly with the exact same Router and network kit. My current workaround is to run the Hub 3 in Router mode with the Wifi turned off. This works but is obviously not ideal given that I'm running Double NAT. I'm considering trying an upgrade to a Hub 5 to see if Modem mode works correctly on it but that seems like grasping at straws. Any suggestions for further troubleshooting I could try? Anyone had similar issues running Hub 3 in Modem mode?Solved1.6KViews0likes10Comments