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Port 3186 (iiw-port)

IANA assigns port 3186 to iiw-port: IIW Monitor User Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
iiw-port TCP IIW Monitor User Port Corey Burnett -
iiw-port UDP IIW Monitor User Port Corey Burnett -

Check what is listening on port 3186

Linux: is anything listening on TCP 3186?
sudo ss -tlnp 'sport = :3186'
Linux: UDP 3186
sudo ss -ulnp 'sport = :3186'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3186
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3186 '
Windows (Command Prompt)
netstat -ano | findstr :3186
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3186 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3186
From Windows
Test-NetConnection HOST -Port 3186
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3186

Block port 3186 in the firewall

ufw
sudo ufw deny 3186/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3186 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3186 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3186' -Direction Inbound -Protocol TCP -LocalPort 3186 -Action Block
ufw
sudo ufw deny 3186/udp
iptables
sudo iptables -A INPUT -p udp --dport 3186 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3186 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3186' -Direction Inbound -Protocol UDP -LocalPort 3186 -Action Block

Related ports

3184apogeex-port3185smpppd3187odi-port3188brcm-comm-port

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