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Port 23456 (aequus)

IANA assigns port 23456 to aequus: Aequus Service.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
aequus TCP Aequus Service James Anson -

Registry dates for this port: registered 2009-02-12.

Check what is listening on port 23456

Linux: is anything listening on TCP 23456?
sudo ss -tlnp 'sport = :23456'
Linux / macOS: which process owns the port
sudo lsof -nP -i :23456
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':23456 '
Windows (Command Prompt)
netstat -ano | findstr :23456
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 23456 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 23456
From Windows
Test-NetConnection HOST -Port 23456

Block port 23456 in the firewall

ufw
sudo ufw deny 23456/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 23456 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 23456 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 23456' -Direction Inbound -Protocol TCP -LocalPort 23456 -Action Block

Related ports

23401novar-alarm23402novar-global23457aequus-alt23546areaguard-neo

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