Default Port Number
| Port number | Protocol | Aplication | Acronym |
|---|---|---|---|
| 20 | TCP | File Transfer Protocol (data) | FTP |
| 21 | TCP | FIle Transfer Protocol (control) | STP |
| 22 | TCP | Secure Shell | SSH |
| 23 | TCP | Telnet | |
| 25 | TCP | Simple Mail Transfer Protocol | SMTP |
| 53 | UDP, TCP | Domain Name Service | DNS |
| 67 | UDP | Dynamic Host Configuration Protocol (server) | DHCP |
| 68 | UDP | Dynamic Host Configuration Protocol (client) | DHCP |
| 69 | UDP | Trivial File Transfer Protocol | TFTP |
| 80 | TCP | Hypertext Transfer Protocol | HTTP |
| 110 | TCP | Post Office Protocol version 3 | POP3 |
| 143 | TCP | Internet Message Acces Protocol | IMAP |
| 161 | UDP | Simple Network Management Protocol | SNMP |
| 443 | TCP | Hypertext Transfer Protocol Secure | HTTPS |
| 137-139, 445 | TCP | Server Message Block | SMB |
| 548/427 | TCP | Apple Filling Protocol | AFP |
| 3389 | TCP, UDP | Remote Desktop Protocol | RDP |