How to sniff connection between web browser and 127.0.0.1:1234 running HTTP proxy on Client B’s machine while taking internet from client A’s machine?

Client A is connected to the public internet.
Client B gateway address is connected to the Client A’s network interface.
Client B is running a Web browser which is sending requests to 127.0.0.1:1234 HTTP Proxy, which encrypts and sends th… Continue reading How to sniff connection between web browser and 127.0.0.1:1234 running HTTP proxy on Client B’s machine while taking internet from client A’s machine?