I have an unusual issue. I have a Pi3B+ running ASL3. Anytime I need to run a command that will download anything that starts with a https, the connection will always fail. I have to wait until it tries 4 times before it will try a http connection and then it always works.
I made no changes to the config. This is a straight up ASL3 install on a Pi3B+
The PI is using a mobile hotspot from T-Mobile. I asked chatgpt and it said to make sure the MTSU was set at 1380, which it is.
That doesn't sound like anything to do with ASL3. What is the command you are referring to? Do you have any output from anything that should work such as an apt update?
mtu setting really isn’t gonna make a difference for you, you need to provide info such as curl –version of wget –version along with openssl version to have a full understanding of how these applications are accessing the backend ssl support.
One way to almost always get a wrong answer is to ask ChatGPT. Yes, I have seen MTU size break SSL connections specifically on TMobile before. I ran into this using Wireguard a few years ago. The MTU size that ended up working best was 1420, not 1480.
Aside from that, though, you will most likely run into other problems using ASL with TMobile if you don’t also use a VPN, like 44net. This has been discussed extensively here in several threads.