network

The other day, I had the need to look closer into the network communication of a (dockerized) JEE application. My usual tcpdump approach wasn’t applicable though because the traffic was TLS-encrypted.Finally, I ended up with a setup where the app used a man-in-the-middle proxy for all its communication - that proxy transparently re-encrypted the traffic which gave me the chance to inspect every single message exchanged. ...

When debugging network related issues the CLI tool tcpdump is a valuable assistant. I usually use a variation of this base command: sudo tcpdump -A -i lo0 -n -s0 -v port 8080...