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Port 2332 (rcc-host)

IANA assigns port 2332 to rcc-host: RCC Host.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rcc-host TCP RCC Host Martin Shoemaker -
rcc-host UDP RCC Host Martin Shoemaker -

Check what is listening on port 2332

Linux: is anything listening on TCP 2332?
sudo ss -tlnp 'sport = :2332'
Linux: UDP 2332
sudo ss -ulnp 'sport = :2332'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2332
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2332 '
Windows (Command Prompt)
netstat -ano | findstr :2332
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2332 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2332
From Windows
Test-NetConnection HOST -Port 2332
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2332

Block port 2332 in the firewall

ufw
sudo ufw deny 2332/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2332 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2332 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2332' -Direction Inbound -Protocol TCP -LocalPort 2332 -Action Block
ufw
sudo ufw deny 2332/udp
iptables
sudo iptables -A INPUT -p udp --dport 2332 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2332 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2332' -Direction Inbound -Protocol UDP -LocalPort 2332 -Action Block

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