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network+ ports
| FTP | 20/21 |
| SSH/SFTP | 22 |
| Telnet | 23 |
| SMTP | 25 |
| TACACS | 49 |
| DNS | 53 |
| DHCP | 67/68 |
| TFTP | 69 |
| HTTP | 80 |
| Kerberos | 88 |
| Pop3 | 110 |
| NNTP | 119 |
| NTP | 123 |
| NetBIOS | 137-139 |
| IMAPv4 | 143 |
| SNMP | 161 |
| SNMPTrap | 162 |
| LDAP | 389 |
| HTTPS/TLS or SSL VPN | 443 |
| CIFS | 445 |
| ISAKMP | 500 |
| Syslog | 514 |
| SMTP on TLS/SSL | 587 |
| LDAP on TLS/SSL | 636 |
| FTP on TLS/SSL | 990 |
| IMAP on TLS/SSL | 993 |
| POP3 on TLS/SSL | 995 |
| Microsoft SQL | 1433 |
| Oracle SQLnet | 1521 |
| L2TP | 1701 |
| PPTP | 1723 |
| MySQL | 3306 |
| RDP | 3389 |
| SIP | 5060/5061 |