CyberHunter
Local dataset, no network
// Other services

Port 8026: CA Audit Distribution Server

Port 8026 is assigned by IANA to ca-audit-ds (CA Audit Distribution Server).

8026

How ca-audit-ds works

Other services
client:8026ca-audit-dsresponse client:8026ca-audit-dsresponse

The client sends a request to port 8026 and the ca-audit-ds 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 8026 dangerous?

We have no specific security note for port 8026. 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 8026

ServicePortTransportDescriptionReferenceUpdated
ca-audit-ds 8026 TCP, UDP CA Audit Distribution Server - 2006-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 8026, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8026'      # process listening on 8026
sudo lsof -nP -i :8026

macOS

sudo lsof -nP -i :8026

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8026 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8026
netstat -ano | findstr :8026

From another machine

nmap -p 8026 -sV <host>
sudo nmap -sU -p 8026 <host>
nc -zv <host> 8026

Block it in the firewall

sudo ufw deny 8026/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8026" -Direction Inbound -LocalPort 8026 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8026 used for?

Port 8026 is assigned by IANA to ca-audit-ds (CA Audit Distribution Server).

Is port 8026 TCP or UDP?

Port 8026 is registered for TCP and UDP.

Is it safe to open port 8026?

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 8026 is open?

On Linux run "ss -ltnup 'sport = :8026'", on macOS "lsof -nP -i :8026", and on Windows "netstat -ano | findstr :8026" to see the local process. From another machine, "nmap -p 8026 <host>" shows whether it is reachable.

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