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| 20 | FTP (data) |
| 21 | FTP (control) |
| 22 | SSH |
| 23 | TELNET |
| 25 | SMTP |
| 53 | DNS |
| 80 | HTTP |
| 110 | POP3 |
| 119 | NNTP |
| 123 | NTP |
| 143 | IMAP |
| 443 | HTTTP |
| 53 | DNS |
| 67 | DHCP (server) |
| 68 | DHCP (client) |
| 69 | TFTP |
| 123 | NTP |
| 161 | SNMP |
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