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// Other services

Port 8025: CA Audit Distribution Agent

Port 8025 is assigned by IANA to ca-audit-da (CA Audit Distribution Agent).

8025

How ca-audit-da works

Other services
client:8025ca-audit-daresponse client:8025ca-audit-daresponse

The client sends a request to port 8025 and the ca-audit-da 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 8025 dangerous?

We have no specific security note for port 8025. 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 8025

ServicePortTransportDescriptionReferenceUpdated
ca-audit-da 8025 TCP, UDP CA Audit Distribution Agent - 2006-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 8025, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8025'      # process listening on 8025
sudo lsof -nP -i :8025

macOS

sudo lsof -nP -i :8025

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8025 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8025
netstat -ano | findstr :8025

From another machine

nmap -p 8025 -sV <host>
sudo nmap -sU -p 8025 <host>
nc -zv <host> 8025

Block it in the firewall

sudo ufw deny 8025/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8025" -Direction Inbound -LocalPort 8025 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8025 used for?

Port 8025 is assigned by IANA to ca-audit-da (CA Audit Distribution Agent).

Is port 8025 TCP or UDP?

Port 8025 is registered for TCP and UDP.

Is it safe to open port 8025?

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 8025 is open?

On Linux run "ss -ltnup 'sport = :8025'", on macOS "lsof -nP -i :8025", and on Windows "netstat -ano | findstr :8025" to see the local process. From another machine, "nmap -p 8025 <host>" shows whether it is reachable.

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