TCP/UDP Port Finder

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Database updated - March 30, 2016

Search results for "903"

Port: 903/TCP
903/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • ideafarm-panic
    self documenting Telnet Panic Door
    IANA
  •  
    VMware Remote Console (Unofficial)
    WIKI
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
  • trojan
    [trojan] Net-Devil. Anti-protection trojan / Remote Access / Keylogger / Steals passwords / Remote peeker. Works on Windows NT, 2000 and XP. tr|force is invvolved in the NetDevil project. Aliases: Backdoor.Net Devil, NetDevil, BackDoor.RP, BDS.NetDev, Win32.NetDevil, Troj.NetDevil
    Simovits
Port: 903/UDP
903/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • ideafarm-panic
    self documenting Panic Door: send 0x00 for info
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple

About TCP/UDP ports

TCP port 903 uses the Transmission Control Protocol. TCP is one of the main protocols in TCP/IP networks. TCP is a connection-oriented protocol, it requires handshaking to set up end-to-end communications. Only when a connection is set up user's data can be sent bi-directionally over the connection.
Attention! TCP guarantees delivery of data packets on port 903 in the same order in which they were sent. Guaranteed communication over TCP port 903 is the main difference between TCP and UDP. UDP port 903 would not have guaranteed communication as TCP.

UDP on port 903 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 903 thinks that error checking and correction is not necessary or performed in the application, avoiding the overhead of such processing at the network interface level.
UDP (User Datagram Protocol) is a minimal message-oriented Transport Layer protocol (protocol is documented in IETF RFC 768).
Application examples that often use UDP: voice over IP (VoIP), streaming media and real-time multiplayer games. Many web applications use UDP, e.g. the Domain Name System (DNS), the Routing Information Protocol (RIP), the Dynamic Host Configuration Protocol (DHCP), the Simple Network Management Protocol (SNMP).
TCP vs UDP - TCP: reliable, ordered, heavyweight, streaming; UDP - unreliable, not ordered, lightweight, datagrams.
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