HTTPfy

Port 3266 (ns-cfg-server)

IANA assigns port 3266 to ns-cfg-server: NS CFG Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ns-cfg-server TCP NS CFG Server Aivi Lie -
ns-cfg-server UDP NS CFG Server Aivi Lie -

Check what is listening on port 3266

Linux: is anything listening on TCP 3266?
sudo ss -tlnp 'sport = :3266'
Linux: UDP 3266
sudo ss -ulnp 'sport = :3266'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3266
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3266 '
Windows (Command Prompt)
netstat -ano | findstr :3266
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3266 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3266
From Windows
Test-NetConnection HOST -Port 3266
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3266

Block port 3266 in the firewall

ufw
sudo ufw deny 3266/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3266 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3266 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3266' -Direction Inbound -Protocol TCP -LocalPort 3266 -Action Block
ufw
sudo ufw deny 3266/udp
iptables
sudo iptables -A INPUT -p udp --dport 3266 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3266 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3266' -Direction Inbound -Protocol UDP -LocalPort 3266 -Action Block

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