Ports and Services – Flashcards
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FTP (Data)
answer
TCP 20
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FTP (Connection / Command / Control)
answer
TCP 21
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Telnet
answer
23
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SMTP (Outgoing E-mail)
answer
TCP 25
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TACACS / TACACS+
answer
TCP/UDP 49
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DNS (Queries)
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UDP 53
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DNS (Zone Transfer)
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TCP 53
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TFTP
answer
UDP 69
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HTTP
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TCP 80
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Kerberos
answer
88
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POP3 - Incoming E-mail (No SSL)
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TCP 110
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NTP (Network Time Protocol)
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UDP 123
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IMAP
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TCP 143
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SNMP (Version 3 most secure, only use this version)
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161
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LDAP (Non-Secure)
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389
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SSL and HTTPS
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TCP 443
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LDAP (Secure)
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636 (Secured with SSL or TLS)
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POP3 - Incoming E-mail (SSL Encrypted)
answer
995
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MS-SQL Database
answer
1433
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RADIUS (Authentication)
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UDP 1812
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RADIUS (Accounting)
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UDP 1813
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RDP
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TCP 3389
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IRC
answer
6667
