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Port 7566 (vsi-omega)

IANA assigns port 7566 to vsi-omega: VSI Omega.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vsi-omega TCP VSI Omega Curtis Smith -
vsi-omega UDP VSI Omega Curtis Smith -

Check what is listening on port 7566

Linux: is anything listening on TCP 7566?
sudo ss -tlnp 'sport = :7566'
Linux: UDP 7566
sudo ss -ulnp 'sport = :7566'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7566
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7566 '
Windows (Command Prompt)
netstat -ano | findstr :7566
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7566 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7566
From Windows
Test-NetConnection HOST -Port 7566
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7566

Block port 7566 in the firewall

ufw
sudo ufw deny 7566/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7566 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7566 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7566' -Direction Inbound -Protocol TCP -LocalPort 7566 -Action Block
ufw
sudo ufw deny 7566/udp
iptables
sudo iptables -A INPUT -p udp --dport 7566 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7566 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7566' -Direction Inbound -Protocol UDP -LocalPort 7566 -Action Block

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