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 "dns"

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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: 53/UDP
53/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • domain
    Domain Name Server
    IANA
  •  
    Domain Name System (DNS) (Official)
    WIKI
  • domain
    Domain Name System (DNS). MacDNS, FaceTime
    Apple
Port: 90/TCP
90/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • dnsix
    DNSIX Securit Attribute Token Map
    IANA
  •  
    dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map (Official)
    WIKI
  •  
    Pointcast (Unofficial)
    WIKI
Port: 90/UDP
90/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • dnsix
    DNSIX Securit Attribute Token Map
    IANA
  •  
    dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map (Official)
    WIKI
  •  
    Pointcast (Unofficial)
    WIKI
Port: 135/TCP
135/TCP - Known port assignments (22 records found)
  • Service
    Details
    Source
  •  
    DCE endpoint resolution (Official)
    WIKI
  • epmap
    DCE endpoint resolution
    IANA
  •  
    Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service, used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM (Unofficial)
    WIKI
  • loc-srv
    NCS local location broker
    SANS
  • threat
    [threat] Secefa
    Bekkoame
  • threat
    [threat] W32.Kiman
    Bekkoame
  • threat
    [threat] Femot
    Bekkoame
  • threat
    [threat] W32.Blaster.Worm
    Bekkoame
  • threat
    [threat] W32.Francette.Worm
    Bekkoame
  • threat
    [threat] W32.Explet
    Bekkoame
  • threat
    [threat] W32.Kibuv.Worm
    Bekkoame
  • threat
    [threat] W32.Lovgate
    Bekkoame
  • threat
    [threat] W32.Maslan
    Bekkoame
  • threat
    [threat] W32.Mytob
    Bekkoame
  • threat
    [threat] W32.Reatle
    Bekkoame
  • threat
    [threat] W32.Spybot
    Bekkoame
  • threat
    [threat] W32.Welchia
    Bekkoame
  • threat
    [threat] W32.Yaha
    Bekkoame
  • threat
    [threat] W32.Cissi
    Bekkoame
  • threat
    [threat] W32.HLLW.Gaobot
    Bekkoame
  • threat
    [threat] W32.HLLW.Polybot
    Bekkoame
  • threat
    [threat] W32.Kassbot
    Bekkoame
Port: 135/UDP
135/UDP - Known port assignments (20 records found)
  • Service
    Details
    Source
  • epmap
    DCE endpoint resolution
    IANA
  •  
    Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service, used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM (Unofficial)
    WIKI
  •  
    DCE endpoint resolution (Official)
    WIKI
  • loc-srv
    Location Service
    SANS
  • threat
    [threat] W32.Blaster.Worm
    Bekkoame
  • threat
    [threat] W32.Cissi
    Bekkoame
  • threat
    [threat] W32.Explet
    Bekkoame
  • threat
    [threat] W32.Francette.Worm
    Bekkoame
  • threat
    [threat] W32.HLLW.Gaobot
    Bekkoame
  • threat
    [threat] W32.HLLW.Polybot
    Bekkoame
  • threat
    [threat] W32.Kassbot
    Bekkoame
  • threat
    [threat] W32.Kibuv.Worm
    Bekkoame
  • threat
    [threat] W32.Lovgate
    Bekkoame
  • threat
    [threat] W32.Maslan
    Bekkoame
  • threat
    [threat] W32.Mytob
    Bekkoame
  • threat
    [threat] W32.Reatle
    Bekkoame
  • threat
    [threat] W32.Spybot
    Bekkoame
  • threat
    [threat] W32.Welchia
    Bekkoame
  • threat
    [threat] W32.Yaha
    Bekkoame
  • threat
    [threat] Femot
    Bekkoame
Port: 195/UDP
195/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dn6-nlm-aud
    DNSIX Network Level Module Audit
    IANA
Port: 195/TCP
195/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dn6-nlm-aud
    DNSIX Network Level Module Audit
    IANA
Port: 196/TCP
196/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dn6-smm-red
    DNSIX Session Mgt Module Audit Redir
    IANA
Port: 196/UDP
196/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dn6-smm-red
    DNSIX Session Mgt Module Audit Redir
    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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