CyberHunter
Local dataset, no network
// Other services

Port 265: X-Bone CTL

Port 265 is assigned by IANA to x-bone-ctl (X-Bone CTL).

265

How x-bone-ctl works

Other services
client:265x-bone-ctlresponse client:265x-bone-ctlresponse

The client sends a request to port 265 and the x-bone-ctl service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 265 dangerous?

We have no specific security note for port 265. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 265

ServicePortTransportDescriptionReferenceUpdated
x-bone-ctl 265 TCP, UDP X-Bone CTL - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 265, and is it reachable?

Linux

sudo ss -ltnup 'sport = :265'      # process listening on 265
sudo lsof -nP -i :265

macOS

sudo lsof -nP -i :265

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 265 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 265
netstat -ano | findstr :265

From another machine

nmap -p 265 -sV <host>
sudo nmap -sU -p 265 <host>
nc -zv <host> 265

Block it in the firewall

sudo ufw deny 265/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 265" -Direction Inbound -LocalPort 265 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 265 used for?

Port 265 is assigned by IANA to x-bone-ctl (X-Bone CTL).

Is port 265 TCP or UDP?

Port 265 is registered for TCP and UDP.

Is it safe to open port 265?

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. Close the port if nothing on the host needs it.

How do I check if port 265 is open?

On Linux run "ss -ltnup 'sport = :265'", on macOS "lsof -nP -i :265", and on Windows "netstat -ano | findstr :265" to see the local process. From another machine, "nmap -p 265 <host>" shows whether it is reachable.

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