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 "x"

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Port: 23/TCP
23/TCP - Known port assignments (20 records found)
  • Service
    Details
    Source
  •  
    Telnet protocol - unencrypted text communications (Official)
    WIKI
  • telnet
    -
    SANS
  • telnet
    Telnet.
    Apple
  • telnet
    Telnet
    IANA
  • threat
    [threat] Tiny Telnet Server - TTS
    Bekkoame
  • threat
    [threat] Truva Atl
    Bekkoame
  • telnet
    [threat] Telnet
    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] Aphex's Remote Packet Sniffer. Remote Access / Network sniffer. Works on Windows. Aliases: Asniffer
    Simovits
  • trojan
    [trojan] AutoSpY. Anti-protection trojan / Remote Access / Worm / Network trojan / DoS tool / Telnet server / Virus dropper / Prank trojan. Works on Windows 95 and 98, together with MS Outlook. At least on version 1.2 Apocalipse, Telnet can be used as client. Aliases: AntiSpy, Backdoor.AntiSpy, Backdoor.AutoSpy
    Simovits
  • trojan
    [trojan] ButtMan. Remote Access. Works on Windows 95, 98 and NT. Aliases: BM, Backdoor.Buttman, Backdoor.Tubma, Backdoor.BR, Tubma
    Simovits
  • trojan
    [trojan] Fire HacKer. Remote Access. Works on Windows. Aliases: Backdoor.FireHacker
    Simovits
  • trojan
    [trojan] My Very Own trojan. Remote Access / FTP server. Works on Windows 95, 98 and ME. Telnet is used as client.
    Simovits
  • trojan
    [trojan] Pest. Remote Access / Keylogger / Steals passwords / Remote peeker / MSN trojan / Port scanner / Destructive trojan. Works on Windows 95, 98, ME, NT, 2000 and XP, together with MS MSN Messenger. the first version(s) did NOT work on Windows 2000. Aliases: Pestdoor, Backdoor.Pestdoor, Antilam, Backdoor.Antilam.g1, Juntador, TrojanDropper.Win32.Juntador.c
    Simovits
  • trojan
    [trojan] RTB 666. Remote Access / FTP server / IP scanner. Works on Windows, together with MS Internet Explorer. Aliases: Backdoor.RTB
    Simovits
  • trojan
    [trojan] Tiny Telnet Server - TTS. Remote Access. Works on Windows. Telnet server.
    Simovits
  • trojan
    [trojan] Truva Atl. Anti-protection trojan / Remote Access. Works on Windows 95 and 98. Aliases: Komut, Backdoor.Komut, Warhome, BKDR_Warhome
    Simovits
  • threat
    [threat] Dagonit
    Bekkoame
  • threat
    [threat] Fire HacKer
    Bekkoame
  • threat
    [threat] MindControl
    Bekkoame
Port: 25/TCP
25/TCP - Known port assignments (47 records found)
  • Service
    Details
    Source
  • smtp
    Simple Mail Transfer Protocol (SMTP). Mail (for sending email); MobileMe Mail (sending)
    Apple
  •  
    Simple Mail Transfer Protocol (SMTP) - used for e-mail routing between mail servers (Official)
    WIKI
  • smtp
    Simple Mail Transfer
    IANA
  • threat
    [threat] Bancos
    Bekkoame
  • threat
    [threat] Barok
    Bekkoame
  • threat
    [threat] Chimo
    Bekkoame
  • threat
    [threat] Email Password Sender - EPS
    Bekkoame
  • threat
    [threat] EPS II
    Bekkoame
  • threat
    [threat] Gip
    Bekkoame
  • threat
    [threat] Gris
    Bekkoame
  • threat
    [threat] Happy99
    Bekkoame
  • threat
    [threat] Hpteam mail
    Bekkoame
  • threat
    [threat] Hybris
    Bekkoame
  • threat
    [threat] I love you
    Bekkoame
  • threat
    [threat] Kuang2
    Bekkoame
  • threat
    [threat] Magic Horse
    Bekkoame
  • threat
    [threat] MBT (Mail Bombing Trojan)
    Bekkoame
  • threat
    [threat] Mitglieder
    Bekkoame
  • threat
    [threat] Moscow Email trojan
    Bekkoame
  • threat
    [threat] Naebi
    Bekkoame
  • threat
    [threat] NewApt worm
    Bekkoame
  • threat
    [threat] ProMail trojan
    Bekkoame
  • threat
    [threat] Rustock
    Bekkoame
  • threat
    [threat] Shtirlitz
    Bekkoame
  • threat
    [threat] Stealth
    Bekkoame
  • threat
    [threat] Tapiras
    Bekkoame
  • threat
    [threat] Terminator
    Bekkoame
  • threat
    [threat] W32.Beagle
    Bekkoame
  • threat
    [threat] W32.HLLP.Sality
    Bekkoame
  • threat
    [threat] WinPC
    Bekkoame
  • threat
    [threat] WinSpy
    Bekkoame
  • trojan
    [trojan] Antigen. Steals passwords. Works on Windows 95, 98, and NT. Aliases: Antigen.a, Trojan.win32.TrojansRussia, Trojan.PSW.Antigen.a
    Simovits
  • trojan
    [trojan] Barok. Steals passwords. Works on Windows 95, 98 and ME. Aliases: Barock, BarokPWSteal.Trojan, Win-Bugsfix.exe
    Simovits
  • trojan
    [trojan] BSE. Remote Access. Works on Windows 95, 98, ME, NT and 2000. Aliases: RAT, Backdoor.BSE
    Simovits
  • trojan
    [trojan] Email Password Sender. Steals passwords / ICQ trojan. Works on Windows 95, 98 and NT. NT compatibility added in v 1.63. From v 1.62 the trojan is called EPS II. Aliases: EPS, EPS II
    Simovits
  • trojan
    [trojan] Gip. Remote Access / Steals passwords / ICQ trojan. Works on Windows 95, 98, NT and 2000, and ICQ 2000. Aliases: PWSteal.WinUp, Trojan.PSW.Gip, MrNop, ICQPass, PriceDoc.Trojan
    Simovits
  • trojan
    [trojan] Laocoon. Remote Access. Works on Windows. Aliases: Backdoor.Laocoon
    Simovits
  • trojan
    [trojan] Magic Horse. Steals passwords. Works on Windows 95, 98 and NT. Aliases: Trojan.PSW.Stealth.d
    Simovits
  • trojan
    [trojan] MBT. Mailbomber. Works on Windows 95, 98 and NT. Aliases: Mailbomb.b, Mail Bombing Trojan
    Simovits
  • trojan
    [trojan] Moscow Email trojan. Mail trojan / Autodialer / ICQ trojan / Steals passwords / Destructive trojan. Works on Windows 95 and 98, together with ICQ 99a. Aliases: Platan, Asp, Win32/Platan.Trojan, Platan.G, IExpand Trojan, DUNpws.bz
    Simovits
  • trojan
    [trojan] Nimda. Virus / Worm / Mail trojan / Network trojan / Hacking tool. Works on Windows 95, 98, ME, NT, 2000 and XP, together with MS Internet Information Server (IIS), MS Internet Explorer 5.5 SP1, MS Outlook , MS Outlook Express and MS Word. Aliases: Concept Virus (CV) v.5, W32.Nimda, Minda, W32.Minda, I-Worm.Nimda, Code Rainbow , PE_Nimda.A, CV-5
    Simovits
  • trojan
    [trojan] Shtirlitz. Steals passwords. Works on Windows 95 and 98. Aliases: Justas, PWSteal.Justas, Mail Shtirlitz, Delf.G, Mazafaker
    Simovits
  • trojan
    [trojan] Stukach. Keylogger. Works on Windows, on 95, 98, ME, NT and 2000. Aliases: Rit, Trojan.PSW.Rit
    Simovits
  • trojan
    [trojan] Tapiras. Steals passwords. Works on Windows 95, 98 and NT. Aliases: DUNpws.f, Backdoor.Tapi, Tapi
    Simovits
  • trojan
    [trojan] WinPC. Steals passwords. Works on Windows 95 and 98. Aliases: DUNpws.s
    Simovits
  • threat
    [threat] Ajan
    Bekkoame
  • threat
    [threat] Antigen
    Bekkoame
Port: 27/TCP
27/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • nsw-fe
    NSW User System FE
    IANA
  •  
    NSW User System FE (Official)
    WIKI
  • altavista-fw97
    AltaVista Firewall97
    SANS
  • trojan
    [trojan] Assasin. Anti-protection trojan / Remote Access / Keylogger / LAN trojan. Works on Windows 95, 98, ME, NT, 2000 and XP. Aliases: A.s.s.A'sin', Backdoor.Assasin, BackDoor.AGS
    Simovits
Port: 52/TCP
52/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • xns-time
    XNS Time Protocol
    IANA
  •  
    XNS (Xerox Network Systems) Time Protocol (Official)
    WIKI
  • 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
  • trojan
    [trojan] Skun. Remote Access / Destructive trojan. Works on Windows. Aliases: Backdoor.Skun
    Simovits
Port: 52/UDP
52/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • xns-time
    XNS Time Protocol
    IANA
  •  
    XNS (Xerox Network Systems) Time Protocol (Official)
    WIKI
Port: 54/TCP
54/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • xns-ch
    XNS Clearinghouse
    IANA
  •  
    XNS (Xerox Network Systems) Clearinghouse (Official)
    WIKI
  • 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
Port: 54/UDP
54/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • xns-ch
    XNS Clearinghouse
    IANA
  •  
    XNS (Xerox Network Systems) Clearinghouse (Official)
    WIKI
Port: 56/TCP
56/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • xns-auth
    XNS Authentication
    IANA
  •  
    Route Access Protocol (RAP) (Unofficial)
    WIKI
  •  
    XNS (Xerox Network Systems) Authentication (Official)
    WIKI
Port: 56/UDP
56/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • xns-auth
    XNS Authentication
    IANA
  •  
    Route Access Protocol (RAP) (Unofficial)
    WIKI
  •  
    XNS (Xerox Network Systems) Authentication (Official)
    WIKI
Port: 58/TCP
58/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • xns-mail
    XNS Mail
    IANA
  •  
    XNS (Xerox Network Systems) Mail (Official)
    WIKI
  • threat
    [threat] DMSetup
    Bekkoame
  • dmsetup
    [trojan] DMSetup
    SANS
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About TCP/UDP ports

TCP port 23 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 23 in the same order in which they were sent. Guaranteed communication over TCP port 23 is the main difference between TCP and UDP. UDP port 23 would not have guaranteed communication as TCP.
UDP on port 23 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 23 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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