CompTIA Security+ Common TCP/UDP Ports

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Last updated 2:28 AM on 8/22/26
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23 Terms

1
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FTP Data/Control Channels

20-21, TCP

2
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SSH, SCP

22, TCP/UDP

3
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Telnet

23, TCP

4
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SMTP

25, TCP

5
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TACACS Authentication Service

49, TCP/UDP

6
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HTTP

80, TCP/UDP

7
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POP3

110, TCP

8
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SFTP

115, TCP

9
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NNTP

119, TCP

10
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NetBIOS Name/Datagram/Session Services

137-139, TCP/UDP

11
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IMAP

143, TCP/UDP

12
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LDAP

389, TCP/UDP

13
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FTPS Data/Control Channels

989-990, TCP/UDP

14
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TFTP

69, UDP

15
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SNMP

161, UDP

16
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DNS Name Queries

53, UDP

17
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HTTPS

443, TCP

18
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LDAPS

636, TCP/UDP

19
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Kerberos

88, TCP/UDP

20
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L2TP

1701, UDP

21
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PPTP

1723, TCP/UDP

22
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Terminal Services/Remote Desktop Services

3389, TCP/UDP

23
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RADIUS

1812, TCP/UDP