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Port 8025 (ca-audit-da)

IANA assigns port 8025 to ca-audit-da: CA Audit Distribution Agent.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ca-audit-da TCP CA Audit Distribution Agent Henning Smith -
ca-audit-da UDP CA Audit Distribution Agent Henning Smith -

Registry dates for this port: registered 2006-07.

Check what is listening on port 8025

Linux: is anything listening on TCP 8025?
sudo ss -tlnp 'sport = :8025'
Linux: UDP 8025
sudo ss -ulnp 'sport = :8025'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8025
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8025 '
Windows (Command Prompt)
netstat -ano | findstr :8025
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8025 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8025
From Windows
Test-NetConnection HOST -Port 8025
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8025

Block port 8025 in the firewall

ufw
sudo ufw deny 8025/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8025 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8025 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8025' -Direction Inbound -Protocol TCP -LocalPort 8025 -Action Block
ufw
sudo ufw deny 8025/udp
iptables
sudo iptables -A INPUT -p udp --dport 8025 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8025 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8025' -Direction Inbound -Protocol UDP -LocalPort 8025 -Action Block

Related ports

8023arca-api8024gaap8026ca-audit-ds8027papachi-p2p-srv

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.