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Port 2392 (tacticalauth)

IANA assigns port 2392 to tacticalauth: Tactical Auth.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tacticalauth TCP Tactical Auth David Yon -
tacticalauth UDP Tactical Auth David Yon -

Check what is listening on port 2392

Linux: is anything listening on TCP 2392?
sudo ss -tlnp 'sport = :2392'
Linux: UDP 2392
sudo ss -ulnp 'sport = :2392'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2392
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2392 '
Windows (Command Prompt)
netstat -ano | findstr :2392
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2392 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2392
From Windows
Test-NetConnection HOST -Port 2392
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2392

Block port 2392 in the firewall

ufw
sudo ufw deny 2392/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2392 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2392 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2392' -Direction Inbound -Protocol TCP -LocalPort 2392 -Action Block
ufw
sudo ufw deny 2392/udp
iptables
sudo iptables -A INPUT -p udp --dport 2392 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2392 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2392' -Direction Inbound -Protocol UDP -LocalPort 2392 -Action Block

Related ports

2390rsmtp23913com-net-mgmt2393ms-olap12394ms-olap2

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