List Of Common Ports And Protocols
List Of Common Ports And Protocols
Below is a list of common ports and protocols as well as the service it is generally associated with. If you feel there are ports that should be on this list, please leave a comment or contact us.
| Port | Description | TCP | UDP |
|---|---|---|---|
| 20 | FTP – data port (File Transfer Protocol) | ✔ | |
| 21 | FTP – command port (File Transfer Protocol) | ✔ | |
| 22 | SSH (Secure Shell) | ✔ | |
| 23 | Telnet | ✔ | |
| 25 | SMTP – Sending Mail (Simple Mail Transfer Protocol) | ✔ | |
| 43 | WHOIS – Domain Name Lookup | ✔ | |
| 53 | DNS (Domain Name System) | ✔ | ✔ |
| 67 | DHCP – Server (Dynamic Host Configuration Protocol) | ✔ | |
| 68 | DHCP – Client (Dynamic Host Configuration Protocol) | ✔ | |
| 80 | HTTP – Webservers such as Apache2 and IIS – more info on accessing websites on alternate ports | ✔ | ✔ |
| 110 | POP3 – Receiving emails (Post Office Protocol, version 3) | ✔ | |
| 123 | NTP (Network Time Protocol) | ✔ | |
| 143 | IMAP – Receiving emails (Internet Message Access Protocol) | ✔ | |
| 443 | SSL – Webserver with encryption (Secure Socket Layer) Plesk Control Panel also uses this port | ✔ | ✔ |
| 1433 | MSSQL – Database (Microsoft SQL Server) | ✔ | ✔ |
| 2082 | cPanel | ✔ | |
| 2083 | cPanel over SSL | ✔ | |
| 2095 | cPanel Webmail | ✔ | |
| 2096 | cPanel Webmail over SSL | ✔ | |
| 3128 | Squid Proxy – Default Squid Proxy Port. Port 8080 is another common port for squid. | ✔ | |
| 3306 | MySQL – Database | ✔ | ✔ |
| 8080 | HTTP Port (Alternate port generally used when port 80 is already in use – more info) | ✔ | |
| 8443 | Plesk Control Panel | ✔ |
Accessing a website on a different port
When you access websites, you are, by default, accessing them on the port 80 since this is the default web port used by websites. This means that http://www.darian-brown.com/ is the exact same as http://www.darian-brown.com:80/ (where :80 specifies the port number). However if the website server is using another port such as a more commonly used alternate port 8080, then you will need to specify the non-default port in the following format: http://www.example.com:8080/ where www.example.com is the website domain or IP address and 8080 is the port number the website is running on.