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Port 8567 (dof-tunnel)

IANA assigns port 8567 to dof-tunnel: DOF Tunneling Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dof-tunnel TCP DOF Tunneling Protocol OpenDOF -
dof-tunnel UDP DOF Tunneling Protocol OpenDOF -

Registry dates for this port: registered 2005-08, last modified 2015-04-23.

Check what is listening on port 8567

Linux: is anything listening on TCP 8567?
sudo ss -tlnp 'sport = :8567'
Linux: UDP 8567
sudo ss -ulnp 'sport = :8567'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8567
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8567 '
Windows (Command Prompt)
netstat -ano | findstr :8567
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8567 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8567
From Windows
Test-NetConnection HOST -Port 8567
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8567

Block port 8567 in the firewall

ufw
sudo ufw deny 8567/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8567 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8567 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8567' -Direction Inbound -Protocol TCP -LocalPort 8567 -Action Block
ufw
sudo ufw deny 8567/udp
iptables
sudo iptables -A INPUT -p udp --dport 8567 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8567 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8567' -Direction Inbound -Protocol UDP -LocalPort 8567 -Action Block

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