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Common ports
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Port Numbers --- | |
Description | |
1 TCP Port Service Multiplexer (TCPMUX) | |
5 Remote Job Entry (RJE) | |
7 ECHO | |
18 Message Send Protocol (MSP) | |
20 FTP -- Data -- File Transfer Protocol (FTP): used for uploading and downloading files to and from a server. | |
21 FTP -- Control -- File Transfer Protocol (FTP): used for uploading and downloading files to and from a server. | |
22 SSH Remote Login Protocol **** | |
23 Telnet | |
25 Simple Mail Transfer Protocol (SMTP): used for sending emails through a server. ***** | |
29 MSG ICP | |
37 Time | |
42 Host Name Server (Nameserv) | |
43 WhoIs | |
49 Login Host Protocol (Login) | |
53 Domain Name System (DNS): Used for the translation of domain names to the IP addresses they are assigned to, employing the use of Name Servers. *** | |
69 Trivial File Transfer Protocol (TFTP) | |
70 Gopher Services | |
79 Finger | |
80 Hyper-Text Transfer Protocol (HTTP): used for (HTML) based web pages, and other types of web site files, such as Active Server Pages (ASP). | |
103 X.400 Standard | |
108 SNA Gateway Access Server | |
109 POP2 | |
110 POP3 Post Office Protocol (POP): Used for receiving emails from a server. | |
115 Simple File Transfer Protocol (SFTP) | |
118 SQL Services | |
119 Newsgroup (NNTP) | |
137 NetBIOS Name Service Network Basic Input/Output System NetBIOS allows applications on separate computers to communicate over a local area network. | |
143 Interim Mail Access Protocol (IMAP) Alternate method used for receiving emails from a server, similar to the POP protocol. | |
150 NetBIOS Session Service | |
156 SQL Server | |
161 SNMP | |
179 Border Gateway Protocol (BGP) | |
190 Gateway Access Control Protocol (GACP) | |
194 Internet Relay Chat (IRC) | |
197 Directory Location Service (DLS) | |
389 Lightweight Directory Access Protocol (LDAP) | |
396 Novell Netware over IP | |
443 HTTPS Secure Socket Layer (SSL): Used for securing and encrypting the connection from a user’s computer | |
to a server in order to protect the packet data being transmitted. | |
444 Simple Network Paging Protocol (SNPP) | |
445 Microsoft-DS -- Server Message Block (SMB): Used for Microsoft Windows Networking communication. | |
458 Apple QuickTime | |
546 DHCP Client | |
547 DHCP Server | |
563 SNEWS | |
569 MSN | |
587 Alternate SMTP: Commonly used as a viable alternative to port 25, as some Internet Service Providers choose to block connectivity on port 25. | |
1080 Socks | |
1167 Continuous Data Protection (CDP): Used for the R1Soft Backup Agent for processing automated off-site server backups. | |
2433 – Microsoft Structured Query Language Server (SQL Server): Used for database connectivity between server and client computers. The port historically used for SQL communications is 1433, however port 1433 is often the subject of brute-force attacks, thus, we at Server Intellect choose to alter the SQL port to 2433 in an effort to reduce the amount of attacks against our servers. | |
3389 Remote Desktop Protocol (RDP): Used for connecting remotely to a server or client computer via Windows Remote Desktop. | |
Well-known ports range from 0 through 1023. | |
Registered ports are 1024 to 49151. | |
Dynamic ports (also called private ports) are 49152 to 65535. | |
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Common port numbers