Port numbers

• File Transfer Protocol

  20/21
• Secure Shell 


  22
• Secure File Transfer Protocol (SFTP)


  22
• Telnet

  23
• Simple Mail Transfer Protocol

  25
• Domain Name System (DNS)


  53
• Dynamic Host Configuration Protocol (DHCP)


  67/68
• Trivial File Transfer Protocol (TFTP)


  69
• Hypertext Transfer Protocol (HTTP)


  80
• Post Office Protocol v3 (POP3)

  110
• Network Time Protocol (NTP)


  123
• Internet Message Access Protocol (IMAP)

  143
• Simple Network Management Protocol (SNMP)


  161/162
• Lightweight Directory Access Protocol (LDAP)

  389
• Hypertext Transfer Protocol Secure (HTTPS) [Secure Sockets Layer (SSL)/Transport Layer Security (TLS)


  443
• Server Message Block (SMB)


  445
• Syslog

  514
• SMTP TLS

  587
• Lightweight Directory Access Protocol [over SSL] (LDAPS)

  636
• IMAP over SSL

  993
• POP3 over SSL

  995
• Structured Query Language (SQL) Server


  1433
• SQLnet


  1521
• MySQL


  3306
• Remote Desktop Protocol (RDP)

  3389
• Session Initiation Protocol (SIP)


  5060/5061