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 "transport"

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Port: 20/TCP
20/TCP - Known port assignments (6 records found)
  • Service
    Details
    Source
  • ftp-data
    File Transfer [Default Data]
    IANA
  •  
    FTP - data transfer (Official)
    WIKI
  • ftp-data
    File Transport Protocol (FTP).
    Apple
  • threat
    [threat] Randex
    Bekkoame
  • sennaspyftpserver
    [trojan] Senna Spy FTP server
    SANS
  • trojan
    [trojan] Amanda. Remote Access / Keylogger / Steals passwords / ICQ trojan. Works on Windows 95 and 98, together with ICQ. Amanda installs under Windows NT, but is not able to run. Aliases: Backdoor.Amanda
    Simovits
Port: 102/TCP
102/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • iso-tsap
    ISO-TSAP Class 0
    IANA
  •  
    ISO-TSAP (Transport Service Access Point) Class 0 protocol (Official)
    WIKI
  • trojan
    [trojan] Delf. Anti-protection trojan / Remote Access / Keylogger / Steals passwords / Remote peeker / Destructive trojan. Works on Windows NT, 2000 and XP. Aliases: Troj_Delf.D, Backdoor.Delf, Backdoor.ADB
    Simovits
  • trojan
    [trojan] Skun. Remote Access / Destructive trojan. Works on Windows. Aliases: Backdoor.Skun
    Simovits
Port: 115/TCP
115/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • sftp
    Simple File Transfer Protocol
    IANA
  •  
    Simple File Transfer Protocol (SFTP) (Official)
    WIKI
  • sftp
    Secure File Transfer Program (SFTP). Note: Some authorities reference a "Simple File Transport Protocol" or "Secured File Transport Protocol" on this port.
    Apple
Port: 189/TCP
189/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • qft
    Queued File Transport
    IANA
Port: 189/UDP
189/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • qft
    Queued File Transport
    IANA
Port: 399/TCP
399/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • iso-tsap-c2
    ISO Transport Class 2 Non-Control over TCP
    IANA
Port: 399/UDP
399/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • iso-tsap-c2
    ISO Transport Class 2 Non-Control over UDP
    IANA
Port: 492/TCP
492/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • ticf-1
    Transport Independent Convergence for FNA
    IANA
Port: 492/UDP
492/UDP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • ticf-1
    Transport Independent Convergence for FNA
    IANA
Port: 493/TCP
493/TCP - Known port assignments (1 record found)
  • Service
    Details
    Source
  • ticf-2
    Transport Independent Convergence for FNA
    IANA
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About TCP/UDP ports

TCP port 20 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 20 in the same order in which they were sent. Guaranteed communication over TCP port 20 is the main difference between TCP and UDP. UDP port 20 would not have guaranteed communication as TCP.
UDP on port 20 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 20 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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