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 "es"

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Port: 53/TCP
53/TCP - Known port assignments (11 records found)
  • Service
    Details
    Source
  • domain
    Domain Name System (DNS). MacDNS, FaceTime
    Apple
  •  
    Domain Name System (DNS) (Official)
    WIKI
  • domain
    Domain Name Server
    IANA
  • threat
    [threat] W32.Dasher
    Bekkoame
  • threat
    [threat] W32.Spybot
    Bekkoame
  • trojan
    [trojan] ADM worm. Worm / Rootkit / Backdoor. Works on Unix (Linux). Affects Linux RedHat 4.0 to 5.2. Aliases: ADM Inet w0rm, Linux.ADM.Worm
    Simovits
  • trojan
    [trojan] li0n. Worm / Steals passwords / Rootkit dropper / Hacking tool / Distributed DoS tool. Works on Unix (Linux), together with BIND 8.2. Aliases: The Lion worm, Linux/Lion, 1i0n, Lion
    Simovits
  • trojan
    [trojan] MscanWorm.
    Simovits
  • trojan
    [trojan] MuSka52. Remote Access / Keylogger / Steals passwords / ICQ trojan / AIM trojan. Works on Windows, together with AOL's Messanger AIM. Aliases: Backdoor.QT, BackDoor.Muska, M52
    Simovits
  • threat
    [threat] Civcat
    Bekkoame
  • threat
    [threat] Esteems
    Bekkoame
Port: 259/TCP
259/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • esro-gen
    Efficient Short Remote Operations
    IANA
  •  
    ESRO, Efficient Short Remote Operations (Official)
    WIKI
Port: 259/UDP
259/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • esro-gen
    Efficient Short Remote Operations
    IANA
  •  
    ESRO, Efficient Short Remote Operations (Official)
    WIKI
  • cp-config
    Check Point FW-1 Nokia P-1 VPN-1
    SANS
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: 621/TCP
621/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • escp-ip
    ESCP
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 621/UDP
621/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • escp-ip
    ESCP
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 642/TCP
642/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • esro-emsdp
    ESRO-EMSDP V1.3
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 642/UDP
642/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • esro-emsdp
    ESRO-EMSDP V1.3
    IANA
  • ipcserver
    Mac OS X RPC-based services. Used by NetInfo, for example.
    Apple
Port: 1342/TCP
1342/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • esbroker
    ESBroker
    IANA
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About TCP/UDP ports

TCP port 53 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 53 in the same order in which they were sent. Guaranteed communication over TCP port 53 is the main difference between TCP and UDP. UDP port 53 would not have guaranteed communication as TCP.
UDP on port 53 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 53 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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