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Port 3269 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
3269 tcp gc-ssl LDAP connection to Global Catalog over SSL. LDAP servers typically use the following ports:
TCP 389 LDAP plain text
TCP 636 LDAP SSL connection
TCP 3268 LDAP connection to Global Catalog
TCP 3269 LDAP connection to Global Catalog over SSL

Cyclops Blink Botnet uses these ports. The malware has targeted governments, WatchGuard firewalls, ASUS routers, etc., it is active as of March 2022, and it is believed to be operated by the Sandworm threat group linked to Russian intelligence. Cyclops Blink botnet malware uses the following TCP ports: 636, 989, 990, 992, 994, 995, 3269, 8443

IANA registered for: Microsoft Global Catalog
SG
3269 tcp,udp msft-gc-ssl, Microsoft Global Catalog over SSL (similar to port 3268, LDAP over SSL) (official) Wikipedia
3269 tcp msft-gc-ssl Microsoft Global Catalog with LDAP SSL SANS
3269 tcp globalcatLDAPssl Global Catalog LDAP over ssl Nmap
3269 tcp,udp msft-gc-ssl Microsoft Global Catalog with LDAP/SSL IANA
3224-3324 udp citrix Citrix NetScaler Gateway XenDesktop–Virtual Desktop/XenApp Worker Server uses port range 3224-3324 UDP for access to applications and virtual desktops with Framehawk. SG
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Related ports: 389  636  989  990  992  994  995  3268  

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External Resources
SANS ISC: port 3269

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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