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// Remote access

Port 7279: Citrix Licensing

Port 7279 is assigned by IANA to ctxlic (Citrix Licensing).

7279

How ctxlic works

Remote access
terminal:7279ctxlic terminal:7279ctxlic

The client opens a session to port 7279: each command typed is sent to the server, which runs it and returns the output.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Remote access
01 Security

Is port 7279 dangerous?

We have no specific security note for port 7279. Its risk depends on the program actually listening on it. General advice for remote access services:

  • Do not expose remote administration directly: use a VPN or a zero-trust access proxy.
  • Require MFA or key-based authentication and lock out brute-force attempts.
  • Log every login and alert on new source addresses.
02 Registry

IANA registry entries for port 7279

ServicePortTransportDescriptionReferenceUpdated
ctxlic 7279 TCP, UDP Citrix Licensing - 2008-01-29

// source: IANA service name and port number registry

03 Check it

Which program uses port 7279, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7279'      # process listening on 7279
sudo lsof -nP -i :7279

macOS

sudo lsof -nP -i :7279

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7279 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7279
netstat -ano | findstr :7279

From another machine

nmap -p 7279 -sV <host>
sudo nmap -sU -p 7279 <host>
nc -zv <host> 7279

Block it in the firewall

sudo ufw deny 7279/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7279" -Direction Inbound -LocalPort 7279 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7279 used for?

Port 7279 is assigned by IANA to ctxlic (Citrix Licensing).

Is port 7279 TCP or UDP?

Port 7279 is registered for TCP and UDP.

Is it safe to open port 7279?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Do not expose remote administration directly: use a VPN or a zero-trust access proxy.

How do I check if port 7279 is open?

On Linux run "ss -ltnup 'sport = :7279'", on macOS "lsof -nP -i :7279", and on Windows "netstat -ano | findstr :7279" to see the local process. From another machine, "nmap -p 7279 <host>" shows whether it is reachable.

05 Related
:22 SSH tcp · udp · sctp · moderate risk :3389 RDP tcp · udp · critical risk :23 Telnet tcp · udp · critical risk :5900 VNC tcp · udp · critical risk :5985 WinRM (HTTP) tcp · udp · high risk :5986 WinRM (HTTPS) tcp · udp · high risk :10000 Webmin tcp · udp · high risk :89 SU/MIT Telnet Gateway tcp · udp

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