Netstat list services and open ports & more

Today we will learn how to list services and open ports on Linux & more

List services with associated port the service is using

netstat -lntup

• - l is used to list listening socket
• - n is using to show port number
• - t to show tcp connexions
• - u to show udp connexions
• - p display programme name

Show ESTABLISHED connexions

netstat -natu | grep 'ESTABLISHED'

• - n is using to show port number
• - a display all sockets
• - t to show tcp connexions
• - u to show udp connexions

Show ESTABLISHED connexions with a specific IP address

netstat -natu | 'ESTABLISHED' | 141.103.61.80

Show routing informations

netstat -r

Continuous listening for services

netstat -lntupc 

Signed Alix.