Hello, Thought I would throw this scenario out there to see if anyone has come across it or have any suggestions to help remedy the issue. I am currently running a L2TP VPN setup on a Unifi Security Gateway to access my Blue Iris PC while away from the home network. When I am away from home and connected to wifi, I can successfully VPN into my home network, BI app works good and can access UI3. When I am away from home and only connected to LTE on my phone, most of the time the VPN says it is connected, but the BI app does not connect, UI3 does not work and basically all other apps on the phone stop working (as if there is no data service any longer). Sometimes the VPN will not connect and the phone says that are no networks available. Reading around the web, this may be a problem with T-Mobile and IPv6. I am currently using a Pixel 2 XL phone, the native Android VPN client and, again, on T-Mobile service. I have tried creating a new APN for the T-Mobile network to use strictly IPv4 protocol, but it has been hit or miss in successfully connecting to the VPN. In fact, I have experienced successful connections where everything works when I switch from the IPv4 APN to the default APN and vice versa. Then it fails to work a 2nd time. Running the logs in Unifi, the USG is recognizing the connection and showing the connection to the VPN IP on the home network. So the communication seems to be in place…I am just not sure where the failure is occurring. Any thoughts? Since I can connect successfully via wifi, is it a high probability that the issue is in fact with T-Mobile LTE service? Thanks.