Certification by CompTIA
Port No. | TCP | UDP | Protocol | Description |
---|---|---|---|---|
9 | UDP | Wake-on-LAN | ||
20 | TCP | UDP | ftp (File Transfer Protocol) | data transfer |
21 | TCP/SCTP | UDP | ftp (File Transfer Protocol) | control command |
22 | TCP/SCTP | UDP | ssh (Secure Shell) | ~> scp(Secure Copy Protocol), sftp(SSH File Transfer Protocol) |
23 | TCP | UDP | telnet | unencrypted text communications |
25 | TCP | UDP | smtp (Simple Mail Transfer Protocol) | email routing between mail servers. SMTP communication between mail servers uses port 25. Mail clients on the other hand, often submit the outgoing emails to a mail server on port 587. Despite being deprecated, mail providers sometimes still permit the use of nonstandard port 465 for this purpose. |
37 | TCP | UDP | time protocol | |
38 | TCP | UDP | rap (Route Access Protocol) | |
39 | TCP | UDP | rlp (Resource Location Protocol) | |
42 | TCP | UDP | Host Name Server Protocol | |
53 | TCP | UDP | DNS (Domain Name System) | |
67,68 | TCP | UDP | DHCP (Dynamic Host Configuration Protocol) | |
69 | TCP | UDP | tftp (Trivial File Transfer Protocol) | |
80 | TCP/SCTP | UDP | http (Hypertext Transfer Protocol) | |
88 | TCP | UDP | Kerberos authentication system | |
101 | TCP | UDP | NIC host name | |
109 | TCP | UDP | pop2 (Post Office Protocol, version 2) | |
110 | TCP | UDP | pop3 (Post Office Protocol, version 3) | |
143 | TCP | UDP | imap (Internet Message Access Protocol) | management of electronic mail messages on a server |
220 | TCP | UDP | imap3 (Internet Message Access Protocol, version 3) | management of electronic mail messages on a server |
389 | TCP | UDP | ldap (Lightweight Directory Access Protocol) | |
443 | TCP | UDP | https (Hypertext Transfer Protocol over TLS/SSL) | |
445 | TCP | smb (Microsoft-DS SMB file sharing) | ||
464 | TCP | UDP | Kerberos Change/Set password | |
465 | TCP | UDP | smtps (Authenticated SMTP over TLS/SSL) | |
520 | UDP | RIP (Routing Information Protocol) | ||
546 | TCP | UDP | DHCPv6 client | |
547 | TCP | UDP | DHCPv6 server | |
548 | TCP | afp (Apple Filing Protocol over TCP) | ||
587 | TCP | smtp (Simple Mail Transfer Protocol) | email message submission | |
853 | TCP | UDP | DNS over TLS | |
989 | TCP | UDP | FTPS Protocol (data), FTP over TLS/SSL | |
990 | TCP | UDP | FTPS Protocol (control), FTP over TLS/SSL | |
992 | TCP | UDP | Telnet protocol over TLS/SSL | |
993 | TCP | imaps (Internet Message Access Protocol over TLS/SSL) |