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Protocol Ports
Ports by Protocol
| Question | Answer |
|---|---|
| FTP - File Transfer Protocol | Port 20, 21 |
| SSH - Secure Shell | Port 22 |
| Telnet | Port 23 |
| SMTP - Simple Mail Transfer Protocol | Port 25 |
| IPSec | Port 50, 51 |
| DNS - Domain Name Server | Port 53 |
| DHCP - Dynamic Host Configuration Protocol | Port 67, 68 |
| TFTP - Trivial File Transfer Protocol | Port 69 |
| HTTP - Hyper Text Transfer Protocol | Port 80 |
| POP3 - Post Office Protocol | Port 110 |
| NNTP - Network News Transport Protocol | Port 119 |
| NTP - Network Transfer Protocol | Port 123 |
| NetBios | Port 135-139 |
| IMAP4 - Internet Message Access Protocol | Port 143 |
| SNMP - Simple Network Management Protocol | Port 161 |
| Lightweight Directory Access Protocol | Port 389 |
| SSL - Secure Sockets Layer | Port 443 |