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Common ports

20 common ports

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Common ports

  1. 1. 1TCP Port Service Multiplexer (TCPMUX)  The specification describes a multiplexing service that may be accessed with a network protocol to contact any one of a number of available TCP services of a host on a single
  2. 2. 5 Remote Job Entry (RJE) Remote job entry is the procedure for sending requests for data processing tasks or 'jobs' to mainframe computers from remote workstations
  3. 3. 7 ECHO
  4. 4. Message send protocol 18 is an application layer protocol used to send a short message between nodes on a network.
  5. 5. 20 FTP -- Data The FTP protocol uses a pair of connections between the FTP client and FTP server.
  6. 6. 21FTP -- Control TP servers open their machine's port 21 and listen for incoming client connections.
  7. 7. 22 SSH Remote Login Protocol is a cryptographic (encrypted) network protocol to allow remote login and other network services to operate securely over an unsecured network.
  8. 8. 23 Telnet this protocol is used to establish a connection to Transmission Control Protocol (TCP) port number 23
  9. 9. 25 Simple Mail Transfer Protocol (SMTP) Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (email) transmission
  10. 10. 29 MSG ICP TCP ports use the Transmission Control Protocol. UDP ports use the Datagram Protocol, a communications protocol for the Internet network
  11. 11. 37 Time A host connects to a server that supports the Time Protocol on port 37. The server then sends the time as a 32-bit unsigned integer in binary format
  12. 12. 42Host Name Server (Name server) is an obsolete network protocol used in translating a host name to an Internet address.
  13. 13. 43 WhoIs is a query and response protocol that is widely used for querying databases that store the registered users
  14. 14. 49 Login Host Protocol (Login) uses the Transmission Control Protocol. TCP is one of the main protocols in TCP/IP networks. Flagged as a virus
  15. 15. 53 Domain Name System (DNS) is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network.
  16. 16. 69Trivial File Transfer Protocol (TFTP) Trivial File Transfer Protocol (TFTP) is a simple, lock- step, File Transfer Protocol which allows a client to get from or put a file onto a remote host.
  17. 17. 70 Gopher Services is a TCP/IP application layer protocol designed for distributing, searching..
  18. 18. 79 Finger exchange of human-oriented status and user information.
  19. 19. 80 HTTP is an application protocol for distributed, collaborative, hypermedia information systems
  20. 20. 103 X.400 Standard X.400 is the messaging standard specified by the ITU- TS Union
  21. 21. http://www.webopedia.com/quick_ref/po rtnumbers.asp http://searchexchange.techtarget.com/defi nition/X400 www.wikipedia.com