TCP/UDP Port Finder

Enter port number (e.g. 21), service (e.g. ssh, ftp) or threat (e.g. nimda)
Database updated - March 30, 2016

Search results for "connect"

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Port: 4/TCP
4/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  •  
    Unassigned
    IANA
  • threat
    [threat] Midnight Commander Sometimes this program is assigned to this prot
    Bekkoame
  • threat
    [threat] Self-Certifying File System(SFS) sfssd acceps connections on TCP port 4 and passes them to the appropriate SFS daemon. SFS is a secure, global file system with completely decentralized control. SFS uses NFS 3 as the underlying protocol for file access.
    Bekkoame
Port: 264/TCP
264/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • bgmp
    BGMP
    IANA
  •  
    BGMP, Border Gateway Multicast Protocol (Official)
    WIKI
  • bgmp
    -
    SANS
  • threat
    [threat] FW1_topo FW1 can be flooded on this port in order to cause CPU utilization to reach 100% and stopping managers from connecting. However, it requires a fast link and access to that port, probably from the local network.
    Bekkoame
Port: 455/TCP
455/TCP - Known port assignments (5 records found)
  • Service
    Details
    Source
  • creativepartnr
    CreativePartnr
    IANA
  • creativepartnr
    -
    SANS
  • threat
    [threat] Fatal Connections
    Bekkoame
  • fatalconnections
    [trojan] Fatal Connections
    SANS
  • trojan
    [trojan] Fatal Connections. Remote Access. Works on Windows 95, 98 and ME. Aliases: Fatcon, Backdoor.Fatcon
    Simovits
Port: 517/TCP
517/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • talk
    like tenex link, but across machine - unfortunately, doesn't use link protocol (this is actually just a rendezvous port from which a tcp connection is established)
    Bekkoame
  • talk
    like tenex link but across
    SANS
Port: 517/UDP
517/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  •  
    Talk (Official)
    WIKI
  • talk
    like tenex link, but across machine - unfortunately, doesn't use link protocol (this is actually just a rendezvous port from which a tcp connection is established)
    Bekkoame
  • talk
    like tenex link but across
    SANS
Port: 641/TCP
641/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • repcmd
    repcmd
    IANA
  •  
    SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic (Official)
    WIKI
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 641/UDP
641/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • repcmd
    repcmd
    IANA
  •  
    SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic (Official)
    WIKI
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 653/TCP
653/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • repscmd
    RepCmd
    IANA
  •  
    SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic (Official)
    WIKI
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 653/UDP
653/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • repscmd
    RepCmd
    IANA
  •  
    SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic (Official)
    WIKI
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 657/TCP
657/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • rmc
    RMC
    IANA
  •  
    IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM) and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration (Official)
    WIKI
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
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About TCP/UDP ports

TCP port 4 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 4 in the same order in which they were sent. Guaranteed communication over TCP port 4 is the main difference between TCP and UDP. UDP port 4 would not have guaranteed communication as TCP.
UDP on port 4 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 4 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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