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Port 13832 (a-trust-rpc)

IANA assigns port 13832 to a-trust-rpc: Certificate Management and Issuing.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
a-trust-rpc TCP Certificate Management and Issuing A-Trust GmbH -

Registry dates for this port: registered 2023-06-05.

Check what is listening on port 13832

Linux: is anything listening on TCP 13832?
sudo ss -tlnp 'sport = :13832'
Linux / macOS: which process owns the port
sudo lsof -nP -i :13832
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':13832 '
Windows (Command Prompt)
netstat -ano | findstr :13832
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 13832 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 13832
From Windows
Test-NetConnection HOST -Port 13832

Block port 13832 in the firewall

ufw
sudo ufw deny 13832/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 13832 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 13832 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 13832' -Direction Inbound -Protocol TCP -LocalPort 13832 -Action Block

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