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Port 569 (ms-rome)

IANA assigns port 569 to ms-rome: microsoft rome.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ms-rome TCP microsoft rome Rudolph Balaz -
ms-rome UDP microsoft rome Rudolph Balaz -

Check what is listening on port 569

Linux: is anything listening on TCP 569?
sudo ss -tlnp 'sport = :569'
Linux: UDP 569
sudo ss -ulnp 'sport = :569'
Linux / macOS: which process owns the port
sudo lsof -nP -i :569
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':569 '
Windows (Command Prompt)
netstat -ano | findstr :569
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 569 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 569
From Windows
Test-NetConnection HOST -Port 569
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 569

Block port 569 in the firewall

ufw
sudo ufw deny 569/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 569 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 569 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 569' -Direction Inbound -Protocol TCP -LocalPort 569 -Action Block
ufw
sudo ufw deny 569/udp
iptables
sudo iptables -A INPUT -p udp --dport 569 -j DROP
nftables
sudo nft add rule inet filter input udp dport 569 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 569' -Direction Inbound -Protocol UDP -LocalPort 569 -Action Block

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