Monday, May 9, 2022

Port Number Usage

 Port Number Usage

20 File Transfer Protocol (FTP) Data Transfer

21 File Transfer Protocol (FTP) Command Control

22 Secure Shell (SSH)

23 Telnet - Remote login service, unencrypted text messages

25 Simple Mail Transfer Protocol (SMTP) E-mail Routing

53 Domain Name System (DNS) service

80 Hypertext Transfer Protocol (HTTP) used in World Wide Web

110 Post Office Protocol (POP3) used by e-mail clients to retrieve e-mail from a server

119 Network News Transfer Protocol (NNTP)

123 Network Time Protocol (NTP)

143 Internet Message Access Protocol (IMAP) Management of Digital Mail

161 Simple Network Management Protocol (SNMP)

194 Internet Relay Chat (IRC)

443 HTTP Secure (HTTPS) HTTP over TLS/SSL

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