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Port 18185 (opsec-omi)

IANA assigns port 18185 to opsec-omi: OPSEC OMI.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
opsec-omi TCP OPSEC OMI Alon Kantor -
opsec-omi UDP OPSEC OMI Alon Kantor -

Check what is listening on port 18185

Linux: is anything listening on TCP 18185?
sudo ss -tlnp 'sport = :18185'
Linux: UDP 18185
sudo ss -ulnp 'sport = :18185'
Linux / macOS: which process owns the port
sudo lsof -nP -i :18185
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':18185 '
Windows (Command Prompt)
netstat -ano | findstr :18185
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 18185 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 18185
From Windows
Test-NetConnection HOST -Port 18185
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 18185

Block port 18185 in the firewall

ufw
sudo ufw deny 18185/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 18185 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 18185 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 18185' -Direction Inbound -Protocol TCP -LocalPort 18185 -Action Block
ufw
sudo ufw deny 18185/udp
iptables
sudo iptables -A INPUT -p udp --dport 18185 -j DROP
nftables
sudo nft add rule inet filter input udp dport 18185 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 18185' -Direction Inbound -Protocol UDP -LocalPort 18185 -Action Block

Related ports

18183opsec-sam18184opsec-lea18186ohsc18187opsec-ela

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