1201 Port Numbers

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Last updated 8:57 PM on 9/5/26
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25 Terms

1
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Port 587 TCP
Used by mail clients — Message Submission Agents (MSAs)
2
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Port 25 TCP
Simple Mail Transfer Protocol (SMTP)
3
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Port 3389 TCP
Remote Desktop Protocol (RDP)​
4
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Port 80 TCP
HyperText Transfer Protocol (HTTP)
5
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Port 443 TCP
HTTP Secure (HTTPS) ; Not just used by HTTPS!!
6
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Port 143 TCP
Internet Mail Access Protocol (IMAP)
7
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Port 67 UDP
Dynamic Host Configuration Protocol (DHCP) Server
8
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Port 636 TCP
Lightweight Directory Access Protocol Secure (LDAPS)
9
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Port 53 TCP/UDP
Domain Name System (DNS)
10
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Port 137-139 UDP/TCP
NetBIOS over TCP/IP
11
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Port 445 TCP
Server Message Block (SMB)
12
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Port 110 TCP
Post Office Protocol (POP)
13
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Port 389 TCP
​Lightweight Directory Access Protocol (LDAP)
14
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Port 4460 TCP
Network Time Security (NTS)
15
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Port 23 TCP
Telnet
16
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Port 68 UDP
DHCP Client
17
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Port 1812/1813 TCP/UDP
Remote Authentication Dial In User Service​ (RADIUS)
18
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Port 514 UDP
Syslog Collector
19
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Port 995 TCP
Post Office Protocol 3 (POP3)
20
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Port 123 UDP
Network Time Protocol (NTP)
21
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Port 20 TCP
File Transfer Protocol (FTP)—Data connection
22
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Port 49 TCP
Terminal Access Controller Access Control System Plus (TACACS+)
23
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Port 22 TCP
Secure Shell (SSH)
24
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Port 21 TCP
File Transfer Protocol (FTP)—Control connection
25
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Port 993 TCP
IMAP-Secure (IMAPS)