| Port Number(s) | Used for |
| 20-21 | FTP |
| 23 | Telnet |
| 25 | SMTP |
| 37 | Time |
| 53 | DNS |
| 79 | Finger |
| 80 | HTTP |
| 110 | POP3 |
| 113 | AUTH |
| 119 | NNTP |
| 137-139 | Netbios |
| 143 | IMAP |
| 161 | SNMP |
| 443 | HTTPS |
| 446 | AS/400 DRDA Ports |
| 449 | CA/400 Port Mapper |
| 1352 | Lotus Notes/Domino |
| 3389 | Windows NT Terminal Server |
| 5631-5632 | PC Anywhere |
| 8470-8479 | CA/400 Host Services |
| 9093 | Frontier DSL |
Last Modified On:
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