What are the common IP ports?

The following ports are commonly used in the system.

7 TCP Echo simple TCP/IP service

7 UDP Echo simple TCP/IP service

9 TCP discards simple TCP/IP services.

9 UDP discards simple TCP/IP services.

13 TCP daytime simple TCP/IP service

13 UDP daytime simple TCP/IP service

17 TCP Quotd simple TCP/IP service

17 UDP Quotd simple TCP/IP service

19 TCP charging simple TCP/IP service

19 UDP charges simple TCP/IP service.

20 TCP FTP default data FTP publishing service

2 1 TCP FTP control FTP publishing service

2 1 TCP FTP controls the application layer gateway service

23 TCP Telnet Telnet

25 TCP SMTP simple mail transfer protocol

25 UDP SMTP Simple Mail Transfer Protocol

25 TCP SMTP Exchange server

25 UDP SMTP Exchange server

42 TCP WINS replicates Windows Internet name service

42 UDP WINS replicates the Windows Internet name service.

53 TCP DNS DNS server

53 UDP DNS DNS server

53 TCP DNS Internet connection _blank "> firewall/internet connection * * *

53 UDP DNS Internet connection _blank "> firewall/internet connection * * *

67 UDP DHCP server DHCP server

67 UDP DHCP server Internet connection _blank "> firewall/Internet connection * * *

69 UDP TFTP ordinary FTP daemon service

80 TCP HTTP Windows media service