Port 3565 (m2pa)

IANA assigns port 3565 to m2pa: M2PA.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

m2pa TCP M2PA - RFC 4165

m2pa SCTP M2PA - RFC 4165

Linux: is anything listening on TCP 3565?

sudo ss -tlnp 'sport = :3565'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3565

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3565 '

Windows (Command Prompt)

netstat -ano | findstr :3565

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3565 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 3565

From Windows

Test-NetConnection HOST -Port 3565

ufw

sudo ufw deny 3565/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3565 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3565 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3565' -Direction Inbound -Protocol TCP -LocalPort 3565 -Action Block

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