Network(ing) on Linux

Misc

Ports in use

sudo lsof -i :5432

Telnet

Is a CLI tool for connecting to TCP servers

Firewall

# UFW activate 
sudo ufw enable
 
# Port 11355 
sudo ufw allow 11355/tcp
 
 
sudo ufw allow 11355/udp
 
# Check rules 
sudo ufw status