HTTPfy

Port 3006 (ii-admin)

IANA assigns port 3006 to ii-admin: Instant Internet Admin.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ii-admin TCP Instant Internet Admin PerfTech Inc -
ii-admin UDP Instant Internet Admin PerfTech Inc -

Registry dates for this port: last modified 2019-12-19.

Check what is listening on port 3006

Linux: is anything listening on TCP 3006?
sudo ss -tlnp 'sport = :3006'
Linux: UDP 3006
sudo ss -ulnp 'sport = :3006'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3006
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3006 '
Windows (Command Prompt)
netstat -ano | findstr :3006
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3006 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3006
From Windows
Test-NetConnection HOST -Port 3006
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3006

Block port 3006 in the firewall

ufw
sudo ufw deny 3006/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3006 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3006 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3006' -Direction Inbound -Protocol TCP -LocalPort 3006 -Action Block
ufw
sudo ufw deny 3006/udp
iptables
sudo iptables -A INPUT -p udp --dport 3006 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3006 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3006' -Direction Inbound -Protocol UDP -LocalPort 3006 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.