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// Other services

Port 9105: Xadmin Control Service

Port 9105 is assigned by IANA to xadmin (Xadmin Control Service).

9105

How xadmin works

Other services
client:9105xadminresponse client:9105xadminresponse

The client sends a request to port 9105 and the xadmin 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 9105 dangerous?

We have no specific security note for port 9105. 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 9105

ServicePortTransportDescriptionReferenceUpdated
xadmin 9105 TCP, UDP Xadmin Control Service Ariën Huisken <xadmin&huisken-systems.nl> 15 June 2009 -

// source: IANA service name and port number registry

03 Check it

Which program uses port 9105, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9105'      # process listening on 9105
sudo lsof -nP -i :9105

macOS

sudo lsof -nP -i :9105

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9105 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9105
netstat -ano | findstr :9105

From another machine

nmap -p 9105 -sV <host>
sudo nmap -sU -p 9105 <host>
nc -zv <host> 9105

Block it in the firewall

sudo ufw deny 9105/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9105" -Direction Inbound -LocalPort 9105 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9105 used for?

Port 9105 is assigned by IANA to xadmin (Xadmin Control Service).

Is port 9105 TCP or UDP?

Port 9105 is registered for TCP and UDP.

Is it safe to open port 9105?

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 9105 is open?

On Linux run "ss -ltnup 'sport = :9105'", on macOS "lsof -nP -i :9105", and on Windows "netstat -ano | findstr :9105" to see the local process. From another machine, "nmap -p 9105 <host>" shows whether it is reachable.

05 Related
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