Linux Networking No.6 : TCP/IP and Ports
...tcp open ftp
22/tcp open ssh
23/tcp open telnet
25/tcp open smtp
70/tcp open gopher
79/tcp open finger
80/tcp open http
This shows open ports, these are ports being used by an application
the /etc/services main ports (examples
ftp-data 20/tcp
ftp 21/tcp
fsp 21/udp fspd
ssh 22/tcp # SSH Remote Login Protocol
ssh 22/udp
telnet 23/tcp
smtp...
