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Port mappings

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This is a simple list of what applications use which TCP and UDP ports. If you know of any errors or omissions then please e-mail me (brian@cryer.co.uk.).

Port	Application
TCP port 7	Echo - for Ping (pre ICMP).
TCP port 8	ICMP - for Ping requests.
TCP port 20	FTP data port - for active FTP connections.
TCP port 21	FTP command. FTPES command.
TCP port 22	SSH, SFTP.
TCP port 23	Telnet
TCP port 25	SMTP (Simple Mail Transfer Protocol)
TCP port 42	WINS
TCP & UDP port 53	DNS
TCP port 79	Finger
TCP port 80	HTTP (web server)
TCP port 110	POP3
TCP port 119	NNTP (Network News Transport Protocol) NNTP bridge (an application from Microsoft which provides an NNTP server interface to their forums).
TCP port 120	NNTP bridge (an application from Microsoft which provides an NNTP server interface to their forums.)
UDP port 123	NTP (Network Time Protocol)
TCP port 135	(Microsoft Windows) DCOM Service Control Manager / Remote Procedure Call service / Endpoint mapper.
TCP port 143	IMAP
TCP port 161	SNMP (Simple Network Management Protocol)
TCP port 162	SNMP Trap
TCP port 443	SSL HTTP. Default port for Secure Socket Layer communications for Web servers (Secure HTTP / HTTPS).
TCP port 444	SharePoint uses for SSL HTTP.
TCP port 465	SSL SMTP
TCP port 587	MSA. (Similar to SMTP.)
TCP port 989	FTP SSL (FTPS) data port for "implicit" FTPS.
TCP port 990	FTP SSL (FTPS) command port for "implicit" FTPS ("explicit" FTP SSL uses port 21).
TCP port 993	SSL IMAP
TCP port 995	SSL POP
TCP port 1334	Writesrv. Microsoft SQL-Server. Popular alternative to using port 1433.
TCP port 1433	Microsoft SQL-Server.
TCP port 1521	Port on which the Oracle RDBMS Listener service listens for new connections.
TCP port 1723	PPTP VPN (used together with protocol 47, GRE)
UDP port 1900	SSDP (Simple Service Discovery Protocol).
TCP port 2082	cPanel
TCP port 2083	SSL cPanel
TCP port 2095	Webmail
TCP port 2096	SSL Webmail
TCP port 3306	MySQL.
TCP port 3389	Microsoft Terminal Server, Remote Desktop client. Windows Remote Assistance.
TCP port 4125	Remote Web Workplace (RWW).
TCP port 4899	Microsoft Remote Administrator.
TCP port 5224	HP Virtual machine console.
TCP port 5555	Default port on which Microsoft Dynamics CRM installs to when not using the default port 80. It is otherwise a standard HTTP web server.
TCP port 5723	Microsoft System Center Operations Manager.
TCP port 5800	VNC web-browser server listens on port 5800 + display number.
TCP port 5900	Default port for VNC (display 0). VNC server listens on port 5900 + display number. The VNC viewer connects on the port.
TCP port 5901	Port used for VNC display 1.
TCP port 5902	Port used for VNC display 2.
TCP port 8080	Popular alternative port for HTTP, which is normally served on port 80.
TCP port 8197	Legato/EMC2 Networker backup.
TCP port 8198	Legato/EMC2 Networker backup.
TCP port 8443	Prallels Plesk control panel. Apache Tomcat SSL. PCSync.
TCP port 42424	ASP.NET State Server. This is used by ASP.NET to communicate with the ASP.NET Session State service.

List ports in use

The netstat command line utility will display information about current TCP/IP network connections:

netstat

List all connections.

netstat -a

List all connections and listening ports.

netstat -n

List all connections and listening ports, but without trying to resolve IP addresses so is much faster.

netstat -b

List all connections and the application involved. This requires an elevated command prompt on Windows.

netstat -ab

List all connections and listening ports, plus the application involved. This requires an elevated command prompt on Windows.

netstat -abn

List all connections and listening ports, plus the application involved but does not try to resolve IP address so is much quicker. This requires an elevated command prompt on Windows.

Other sources:

• www.iana.org/assignments/port-numbers - Possibly as close to a definitive list as you are likely to get.
• http://everything.explained.at/List_of_TCP_and_UDP_port_numbers - List of well known port numbers.