HTTPfy

Port 2006 (raid-cd)

IANA assigns port 2006 to raid-cd: raid.

Registered (user) port, 1024-49151 UDP

Port 2006 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
raid-cd UDP raid - -

Check what is listening on port 2006

Linux: UDP 2006
sudo ss -ulnp 'sport = :2006'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2006
Windows (Command Prompt)
netstat -ano | findstr :2006
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 2006

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2006

Block port 2006 in the firewall

ufw
sudo ufw deny 2006/udp
iptables
sudo iptables -A INPUT -p udp --dport 2006 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2006 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2006' -Direction Inbound -Protocol UDP -LocalPort 2006 -Action Block

Related ports

2003Graphite (Carbon plaintext)2004emce2010pipe-server2011raid-cc

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