netstat

command overview

netstat -a
- Displays all of the current connections and listening ports on the system
netstat -t
- list tcp connections
netstat -u
- list udp connections
netstat -at
- list all TCP ports
netstat -au
- list all udp ports
netstat -r
- Display routing table
netstat -l
- Display listening ports
netstat -lx
- list linux listenig ports
netstat -lp
- display all the listening ports (both TCP and UDP) along with the process IDs and the names of the programs
netstat -s
- Statistics by Protocol
*netstat -an grep ‘:[port number]’*
- find portnumber
netstat -nao
- will tell you what ports your system has listening, as well as what you are connected to via TCP
netstat -naob
- This gives you the process name rather than the process ID (run as Administrator)