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Port 23456 Details
known port assignments and vulnerabilities
threat/application/port search:
| Port(s) |
Protocol |
Service |
Details |
Source |
| 23456 |
tcp |
trojans |
Common sequence of numbers "2 3 4 5 6" often used as default port by some programs and trojans.
Cisco SD-WAN edge devices use these ports to establish connections with peers in the overlay network:
UDP ports 12346, 12446, 12546, 12646 (UDP if DTLS)
TCP ports: 23456, 23556, 23656, 23756 (TCP if DTLS)
Trojans/backdoors that use this port: Evil FTP, Ugly FTP, WhackJob
An issue was discovered on AVStar PE204 3.10.70 IP camera devices. A denial of service can occur on open TCP port 23456. After a TELNET connection, no TCP ports are open.
References: [CVE-2019-18382], [XFDB-170155]
Backdoor.Win32.NetBull.11.b / Remote Buffer Overflow - NetBull.11.b listens on both TCP ports 23456 and 23457, sending a large junk packet results in buffer overflow overwriting stack registers.
References: [MVID-2021-0066] |
SG
|
| 23456 |
udp |
games |
Flight Simulator 2004 |
SG
|
| 23456 |
tcp |
trojan |
Clandestine, Evil FTP, Vagr Nocker, Whack Job |
Trojans
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| 23456 |
tcp |
EvilFTP |
[trojan] Evil FTP |
SANS
|
| 23456 |
tcp |
UglyFTP |
[trojan] Ugly FTP |
SANS
|
| 23456 |
tcp |
WhackJob |
[trojan] Whack Job |
SANS
|
| 6073,23456,2302-2400 |
udp |
applications |
Flight Simulator 2004 |
Portforward
|
| 6073,23456,2302-2400 |
udp |
applications |
FSHost |
Portforward
|
| 6073,23456,2302-2400 |
udp |
applications |
FSHostClient |
Portforward
|
| 2300-2400,6073,23456 |
udp |
applications |
Microsofts Flight Simulator X |
Portforward
|
| 23456 |
tcp,udp |
threat |
Trojan:EvilFTP |
Bekkoame
|
| 23456 |
tcp,udp |
threat |
Ugly FTP |
Bekkoame
|
| 23456 |
tcp,udp |
threat |
Whack Job |
Bekkoame
|
| 23456 |
tcp |
aequus |
Aequus Service, registered 2009-02-12 |
IANA
|
| 23456 |
udp |
|
Reserved |
IANA
|
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15 records found
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jump to:
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Related ports: 12345 12346 12446 23457 23556 6073
« back to SG Ports
External Resources
SANS Internet Storm Center: port 23456
Notes:
Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify
a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly
used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.
TCP ports use the Transmission Control Protocol, the most commonly used protocol
on the Internet and any TCP/IP network. TCP enables two hosts
to establish a connection and exchange streams of data. TCP guarantees delivery of data
and that packets will be delivered in the same order in which they were sent.
Guaranteed communication/delivery is the key difference between TCP and UDP.
UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol)
and facilitates the transmission of datagrams from one computer to applications on another computer,
but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received
the message to process any errors and verify correct delivery. UDP is often used with time-sensitive
applications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data.
When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them.
This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command.
We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software.
For more detailed and personalized help please use our forums.
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