TCP UDP Ports
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Some common TCP and UDP port numbers, for a more complete list see
- http://www.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
- http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml
| Port | Transport | Application | Notes / Comments |
|---|---|---|---|
| 20 | TCP | FTP | Data transfer |
| 21 | TCP | FTP | Control |
| 22 | TCP | SSH | |
| 23 | TCP | Telnet | |
| 25 | TCP | SMTP | |
| 53 | UDP | DNS | |
| 68 | UDP | DHCP | |
| 80 | TCP | HTTP | |
| 110 | TCP | POP3 | |
| 123 | UDP | NTP | |
| 143 | TCP | IMAP | |
| 161 | UDP [1] | SNMP | Gets (polling), initiated to managed device |
| 162 | UDP [1] | SNMP | Traps, initiated from managed device |
| 389 | TCP | LDAP | |
| 427 | UDP/TCP | CIM SLP | |
| 443 | TCP | HTTPS | HTTP over SSL or TLS |
| 445 | TCP | SMB | |
| 514 | UDP [1] | Syslog | |
| 902 | TCP | VMware | VM remote console on ESX4 and above hosts |
| 903 | TCP | VMware | VM remote console on ESX3 hosts |
| 989 | TCP | Implicit FTPS [2] | FTP data over SSL or TLS |
| 990 | TCP | Implicit FTPS [2] | FTP control over SSL or TLS |
| 993 | TCP | IMAP | Over SSL |
| 1433 | TCP | MS SQL | |
| 2049 | UDP/TCP | NFS Client | |
| 3260 | TCP | iSCSI | |
| 3306 | TCP | MySQL | |
| 3389 | TCP | RDP | |
| 5988 | TCP | CIM | |
| 5900 | TCP | VNC | |
| 6501 | TCP | VMware | Auto Deploy |
| 6502 | TCP | VMware | Auto Deploy |
- ↑ 1.0 1.1 1.2 UDP is the normal transport used for this protocol, but TCP can be used if you really want to (and your applications support it). In general there is good reason to use UDP over TCP, and you should leave well alone!
- ↑ 2.0 2.1 Whilst FTPS can use different ports to standard FTP, this is not necessary, and FTP servers are normally capable of accepting secure connections without using different TCP ports. Explicit FTPS uses the standard FTP ports and the client and server negotiate secure communications. Implicit FTPS uses different ports. Be aware that some firewalls are incapable of tracking explicit FTPS when it moves to use high ports for data transfer.