TCP/UDP Port Finder
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Port: 491/UDP
491/UDP - Known port assignments (2 records found)
Port: 504/TCP
504/TCP - Known port assignments (3 records found)
Port: 504/UDP
504/UDP - Known port assignments (3 records found)
Port: 513/TCP
513/TCP - Known port assignments (6 records found)
- ServiceDetailsSource
- loginremote login a la telnet; automatic authentication performed based on priviledged port numbers and distributed data bases which identify "authentication domains"IANA
- rlogin (Official)WIKI
- loginBSD rlogind(8)SANS
- threat[threat] GrloginBekkoame
- grlogin[trojan] GrloginSANS
- 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.WormSimovits
Port: 515/TCP
515/TCP - Known port assignments (5 records found)
- ServiceDetailsSource
- printerspoolerIANA
- Line Printer Daemon - print service (Official)WIKI
- printerLine Printer (LPR), Line Printer Daemon (LPD). Used for printing to a network printer, Printer Sharing in Mac OS X.Apple
- trojan[trojan] MscanWorm.Simovits
- trojan[trojan] Ramen. Worm / HTML trojan / HTTP server / Hacking tool / Destructive trojan. Works on Unix (Linux). Linux Red Hat 6.x and early versions of 7.0. May also work on other Unix dialects such as FreeBSD and Linux SuSE, Mandrake and Cladera. The mail addresses used are [email protected] and [email protected]. Aliases: Linux.Ramen, Worm.Ramen, Elf.RamenSimovits
Port: 538/TCP
538/TCP - Known port assignments (2 records found)
Port: 538/UDP
538/UDP - Known port assignments (2 records found)
Port: 634/TCP
634/TCP - Known port assignments (3 records found)
Port: 634/UDP
634/UDP - Known port assignments (3 records found)
Port: 641/TCP
641/TCP - Known port assignments (3 records found)
About TCP/UDP ports
TCP port 491 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 491 in the same order in which they were sent. Guaranteed communication over TCP port 491 is the main difference between TCP and UDP. UDP port 491 would not have guaranteed communication as TCP.
UDP on port 491 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 491 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.
Attention! TCP guarantees delivery of data packets on port 491 in the same order in which they were sent. Guaranteed communication over TCP port 491 is the main difference between TCP and UDP. UDP port 491 would not have guaranteed communication as TCP.
UDP on port 491 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 491 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.
Your IP address
18.119.253.93