Port Standard on the Network Applications and Protocols

In computer networking terminology, a port is point-specific communication used by an application that uses the transport layer in TCP / IP technology. This article tells about some of the ports used by applications or the standard protocol.

In computer terminology, there are two types of ports, namely:

• Physical Port, is a socket / slot / socket on the back of the CPU as a liaison computer input-output devices, such as the PS2 port used by the Mouse and Keyboard, USB Port or Parallel Port.
• Port Logic (non-physical), is the port that is in use by applications as channels for connecting with other computer technology mealalui TCP / IP, of course, including an internet connection.

Which will be discussed in this article is the port logic, it might be useful for those of you who manage Linux servers for various purposes.

Port Standards and Usability

1-19, various protocols, Most of the ports is not so in need but can not be bothered. For example echo service (port 7) should not be confused with the common ping program.

20 - FTP-DATA. "Active" FTP connections use two ports: 21 is the control port, and 20 is where the incoming data. Passive FTP does not use port 20 at all.

21 - FTP server port used by File Transfer Protocol. When someone is accessing an FTP server, then by default the ftp client will connect through port 21.

22 - SSH (Secure Shell), this port is the standard port for SSH, usually modified by the management server for security reasons.

23 - Telnet server. If you are running a telnet server so this port used for connection with telnet client telnet server.

25 - SMTP, Simple Mail Transfer Protocol, mail server or port, is the standard port used in sending e-mail communication between fellow SMTP Server.

37 - Service Time, ports built-in to the service time.

53 - DNS, or Domain Name Server port. Name Server uses this port, and answer questions related to penerjamahan domain name to IP Address.

67 (UDP) - BOOTP, or DHCP port (server). Need for Dynamic Addressing is done through this port.

68 (UDP) - BOOTP, or DHCP port used by the client.

69 - tftp, or Trivial File Transfer Protocol.

79 - Port Finger, is used to provide information about the system, and user login.

80 - WWW or HTTP web server port. The most common port used on the Internet.

81 - Port Alternative Web Server, when port 80 blocked the port 81 can be used as an alternative port for serving HTTP.

98 - Port Administration linuxconf web access port.

110 - POP3 Port, aka Post Office Protocol, pop mail server port. If you retrieve emails stored on the server can use POP3 technology that runs on this port.

111 - SunRPC (Sun Remote Procedure Call), or portmapper port. Used by NFS (Network File System), NIS (Network Information Service), and various related services.

113 - identd or auth server port. Sometimes necessary, by some form of long service (such as SMTP and IRC) to validate the connection.

119 - NNTP or port used by the News Server, they are very rarely used.

123 - Network Time Protocol (NTP), the port used for synchronization with server time where high accuracy is required.

137-139 - NetBIOS (SMB).

143 - IMAP, Interim Mail Access Protocol. Is an application that allows you to read e-mail that resides on a server from a computer at home / our office, this protocol is slightly different from the POP.

161 - SNMP, Simple Network Management Protocol. More commonly used in routers and switches to monitor statistics and vital signs (monitoring purposes).

177 - XDMCP, X Display Management Control Protocol for remote connections to an X server.

443 - HTTPS, secure HTTP (WWW) protocol in fairly wide use.

465 - SMTP over SSL, e-mail server protocol

512 (TCP) - exec is how to show in netstat. Actually the proper name is rexec suite of tools, for Remote Execution.

512 (UDP) - biff, the protocol for mail notification.

513 - Login, actually rlogin, aka Remote Login. Nothing to do with the standard / bin / login that we use every time we log in..

514 (TCP) - Shell is a nickname, and how netstat shows it. Actually, rsh is the application for "Remote Shell". Like all the "r" command this throw back to kindler, very smooth.

514 (UDP) - syslog daemon port, only used for remote logging purposes.

515 - lp or print server port.

587 - MSA, Mail Submission Agent. A new mail handling protocol supported by most MTA's (Mail Transfer Agent).

631 - CUPS (Daemon for printing purposes), ports that serve the web-based service management.

635 - mountd, part of NFS.

901 - SWAT, Samba Web Administration Tool ports. The port used by web-based management application SAMBA.

993 - IMAP over SSL.

995 - POP over SSL.

1024 - This is the first port which is an unprivileged port, which is assigned dynamically by the kernel to whatever application requests it. Other applications generally use unprivileged ports above port 1024.

1080 - Socks Proxy Server.

1433 - MS SQL server port.

2049 - nfsd, Network File Service Daemon port.

2082 - Port cPanel, this port is used for web-based management applications provided by cpanel.

2095 - This port is in use for cpanel webmail application.

2086 - This port is in use for WHM or Web Host Manager cPanel.

3128 - Port Squid Proxy server.

3306 - MySQL server port.

5432 - PostgreSQL server port.

6000 - X11 TCP port for the remote. Include ports 6000-6009 since X can support a variety of display and each display will have its own port. SSH X11Forwarding will start using the port in 6010.

6346 - Gnutella.

6667 - ircd, Internet Relay Chat Daemon.

6699 - Napster.

7100-7101 - Some font servers use these ports.

8000 and 8080 - Common Web Cache and Web Proxy server port.

10 000 - Webmin, the port used by webmin in web-based management services.

There are still many applications that are commonly used ports but has not been mentioned, to know more about the port and its usefulness please visit http://www.iana.org/assignments/port-numbers.