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// Other services

Port 22125: dCache Access Protocol

Port 22125 is assigned by IANA to dcap (dCache Access Protocol).

22125

How dcap works

Other services
client:22125dcapresponse client:22125dcapresponse

The client sends a request to port 22125 and the dcap service answers.

Transport
TCP
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 22125 dangerous?

We have no specific security note for port 22125. 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 22125

ServicePortTransportDescriptionReferenceUpdated
dcap 22125 TCP dCache Access Protocol - 2009-03-10
-22125-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 22125, and is it reachable?

Linux

sudo ss -ltnup 'sport = :22125'      # process listening on 22125
sudo lsof -nP -i :22125

macOS

sudo lsof -nP -i :22125

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 22125 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 22125
netstat -ano | findstr :22125

From another machine

nmap -p 22125 -sV <host>
nc -zv <host> 22125

Block it in the firewall

sudo ufw deny 22125/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 22125" -Direction Inbound -LocalPort 22125 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 22125 used for?

Port 22125 is assigned by IANA to dcap (dCache Access Protocol).

Is port 22125 TCP or UDP?

Port 22125 is registered for TCP.

Is it safe to open port 22125?

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 22125 is open?

On Linux run "ss -ltnup 'sport = :22125'", on macOS "lsof -nP -i :22125", and on Windows "netstat -ano | findstr :22125" to see the local process. From another machine, "nmap -p 22125 <host>" shows whether it is reachable.

05 Related
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