Sometimes you only have one phone nearby, but you need to solve some network problems. I hope NetCat can help you.
1.SSH client:
NetCat allows you to connect to your server via a secure protocol. You can execute some commands remotely or access some addresses through it.
2.Traceroute:
NetCat can display the IP address of the router that the packet passes through on the IP network.
3.Diagnostics:
You can test the network speed of these countries to understand your network problems.Note that this is not a VPN function.