tunneling

问题 I want to do UDP Hole Punching with two clients with the help of a server with a static IP. The server waits for the two clients on port 7070 and 7071. After that it sends the IP address and port to each other. This part is working fine. But I'm not able to establish a communication between the two clients. I tried the code in different Wifi networks and in 3G mobile network. The client program throws the IO-Exception "No route to host". The client code is used for both clients. Once executed

问题 I am trying to use a python script to get an SQL dump from a remote host, with an intermediate host as proxy, like so: local machine -> proxy -> remote The proxy needs to be there because the remote host only allows connections through that proxy. Note: I am aware of a similar question at How to connect to a database through a Paramiko Tunnel (or similar package) but the solution seems to be specific to PostgreSQL. I am making the connection using SSH via paramiko. I am aware that forward.py