Well-Known Port Numbers

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FTP data

TCP:20

FTP control

TCP:21

SSH

TCP:22

Telnet

TCP:23

SMTP

TCP:25

DNS

UDP,TCP:53

DHCP

UDP:67,68

TFTP

UDP:69

HTTP

TCP:80

POP3

TCP:110

SNMP

UDP:161

SSL

TCP:443

RTP-based Voice (VoIP) and Video

UDP:16,384-32,767


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