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Port 2011 (raid-cc)

IANA assigns port 2011 to raid-cc: raid.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
raid-cc TCP raid - -

Check what is listening on port 2011

Linux: is anything listening on TCP 2011?
sudo ss -tlnp 'sport = :2011'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2011
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2011 '
Windows (Command Prompt)
netstat -ano | findstr :2011
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2011 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2011
From Windows
Test-NetConnection HOST -Port 2011

Block port 2011 in the firewall

ufw
sudo ufw deny 2011/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2011 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2011 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2011' -Direction Inbound -Protocol TCP -LocalPort 2011 -Action Block

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