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Port 2071 (acp-port)

IANA assigns port 2071 to acp-port: Axon Control Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
acp-port TCP Axon Control Protocol Christiaan Simons -
acp-port UDP Axon Control Protocol Christiaan Simons -

Check what is listening on port 2071

Linux: is anything listening on TCP 2071?
sudo ss -tlnp 'sport = :2071'
Linux: UDP 2071
sudo ss -ulnp 'sport = :2071'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2071
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2071 '
Windows (Command Prompt)
netstat -ano | findstr :2071
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2071 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2071
From Windows
Test-NetConnection HOST -Port 2071
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2071

Block port 2071 in the firewall

ufw
sudo ufw deny 2071/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2071 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2071 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2071' -Direction Inbound -Protocol TCP -LocalPort 2071 -Action Block
ufw
sudo ufw deny 2071/udp
iptables
sudo iptables -A INPUT -p udp --dport 2071 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2071 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2071' -Direction Inbound -Protocol UDP -LocalPort 2071 -Action Block

Related ports

2069event-port2070ah-esp-encap2072msync2073gxs-data-port

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