Common ports & protocols

Just a reminder :)

TCP

  • FTP 21

  • SSH 22

  • TELNET 23

  • SMTP 25

  • DNS 53

  • HTTP 80

  • HTTPS 443

  • POP3 110

  • SMB 139 / 445

  • IMAP 143

UDP

  • DNS 53

  • DHCP 67 / 68

  • TFTP 69

  • SNMP 161

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