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 "connection"

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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: 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: 693/TCP
693/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • connendp
    almanid Connection Endpoint
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 693/UDP
693/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • connendp
    almanid Connection Endpoint
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 1000/TCP
1000/TCP - Known port assignments (7 records found)
  • Service
    Details
    Source
  • cadlock2
    -
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
  • trojan
    [trojan] Direct Connection. Remote Access. Works on Windows. Aliases: Backdoor.DirectConnection
    Simovits
  • trojan
    [trojan] GOTHIC Intruder. Works on Windows.
    Simovits
  • trojan
    [trojan] Theef. Anti-protection trojan / Remote Access / Keylogger / Port proxy / FTP server / Remote peeker. Works on Windows 95, 98, ME, NT and XP. Aliases: Backdoor.Theef, BackDoor.QW, Bkdr_Delf.AX
    Simovits
  • trojan
    [trojan] Der Spaeher. Remote Access / Keylogger / Virus dropper / ICQ trojan. Works on Windows 95, 98 and ME. Exists both in English and German versions. Aliases: DS3
    Simovits
  • threat
    [threat] Der Spaher / Der Spaeher, Direct Connection, Nibu
    Bekkoame
Port: 1189/TCP
1189/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • unet
    Unet Connection
    IANA
Port: 1189/UDP
1189/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • unet
    Unet Connection
    IANA
Port: 1236/TCP
1236/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • bvcontrol
    bvcontrol
    IANA
  •  
    Symantec BindView Control UNIX Default port for TCP management server connections (Official)
    WIKI
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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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