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Port 8404 (svcloud)

IANA assigns port 8404 to svcloud: SuperVault Cloud.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
svcloud TCP SuperVault Cloud Nine Technology LLC -

Registry dates for this port: registered 2009-09-14, last modified 2011-08-01.

Check what is listening on port 8404

Linux: is anything listening on TCP 8404?
sudo ss -tlnp 'sport = :8404'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8404
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8404 '
Windows (Command Prompt)
netstat -ano | findstr :8404
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8404 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8404
From Windows
Test-NetConnection HOST -Port 8404

Block port 8404 in the firewall

ufw
sudo ufw deny 8404/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8404 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8404 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8404' -Direction Inbound -Protocol TCP -LocalPort 8404 -Action Block

Related ports

8402abarsd8403admind8405svbackup8415dlpx-sp

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