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 "service"

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Port: 158/UDP
158/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • pcmail-srv
    PCMail Server
    IANA
  •  
    DMSP, Distributed Mail Service Protocol (Unofficial)
    WIKI
Port: 191/TCP
191/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • prospero
    Prospero Directory Service
    IANA
Port: 191/UDP
191/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • prospero
    Prospero Directory Service
    IANA
Port: 197/TCP
197/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dls
    Directory Location Service
    IANA
Port: 197/UDP
197/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dls
    Directory Location Service
    IANA
Port: 198/TCP
198/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dls-mon
    Directory Location Service Monitor
    IANA
Port: 198/UDP
198/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • dls-mon
    Directory Location Service Monitor
    IANA
Port: 261/TCP
261/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • nsiiops
    IIOP Name Service over TLS/SSL
    IANA
  • fw1-mgmt
    Checkpoint Firewall-1 Management
    SANS
  • nsiiops
    IIOP Name Service over TLS SSL
    SANS
Port: 261/UDP
261/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • nsiiops
    IIOP Name Service over TLS/SSL
    IANA
  • nsiiops
    IIOP Name Service over TLS SSL
    SANS
Port: 267/TCP
267/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • td-service
    Tobit David Service Layer
    IANA
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About TCP/UDP ports

TCP port 158 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 158 in the same order in which they were sent. Guaranteed communication over TCP port 158 is the main difference between TCP and UDP. UDP port 158 would not have guaranteed communication as TCP.
UDP on port 158 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 158 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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