| On Exam | Port(s) | Service | Notes |
|---|---|---|---|
| ✓ | tcp 20 |
FTP (active) | |
| ✓ | tcp 21 |
FTP (control) | |
| ✓ | tcp 22 |
SSH | |
| ✓ | tcp 22 |
SFTP | FTP using SSH tunnel |
| ✓ | tcp 23 |
TELNET | |
| ✓ | tcp 25 |
SMTP | |
tcp 49 |
TACAS+ | ||
| ✓ | tcp 80 |
HTTP | |
tcp 88 |
Kerberos | ||
| ✓ | tcp 110 |
POP3 | |
tcp 137 |
NetBIOS | ||
| ✓ | tcp 143 |
IMAP4 | |
| ✓ | tcp 389 |
LDAP | |
| ✓ | tcp 443 |
HTTPS | |
| ✓ | tcp 445 |
SMB / CIFS | |
| ✓ | tcp 636 |
LDAPS | No longer supported |
tcp 989 |
FTPS (active) | FTP over SSL | |
tcp 990 |
FTPS (control) | FTP over SSL | |
| ✓ | tcp 1720 |
H.323 | Video Presentation Codec |
| ✓ | tcp 3389 |
RDP | |
tcp 5004 |
RTP | VoIP | |
tcp 5005 |
RTP | VoIP | |
| ✓ | tcp 5060 |
SIP | |
| ✓ | tcp 5061 |
SIP | |
| ✓ | udp 53 |
DNS | |
| ✓ | udp 67 |
DHCP (server) | |
| ✓ | udp 68 |
DHCP (client) | |
| ✓ | udp 69 |
TFTP | No security, whatsoever |
| ✓ | udp 123 |
NTP | |
udp 138 |
NetBIOS Datagram | ||
| ✓ | udp 161 |
SNMP agent | |
udp 162 |
SNMP NMS | ||
udp 389 |
LDAP | ||
udp 10161 |
SNMP agent | TLS encrypted | |
udp 10162 |
SNMP NMS | TLS encrypted |
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Copyright 2021 · Eric D. Weise