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Port 3567 (dof-eps)

IANA assigns port 3567 to dof-eps: DOF Protocol Stack.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dof-eps TCP DOF Protocol Stack OpenDOF -
dof-eps UDP DOF Protocol Stack OpenDOF -

Registry dates for this port: registered 2002-08, last modified 2015-04-23.

Check what is listening on port 3567

Linux: is anything listening on TCP 3567?
sudo ss -tlnp 'sport = :3567'
Linux: UDP 3567
sudo ss -ulnp 'sport = :3567'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3567
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3567 '
Windows (Command Prompt)
netstat -ano | findstr :3567
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3567 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3567
From Windows
Test-NetConnection HOST -Port 3567
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3567

Block port 3567 in the firewall

ufw
sudo ufw deny 3567/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3567 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3567 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3567' -Direction Inbound -Protocol TCP -LocalPort 3567 -Action Block
ufw
sudo ufw deny 3567/udp
iptables
sudo iptables -A INPUT -p udp --dport 3567 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3567 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3567' -Direction Inbound -Protocol UDP -LocalPort 3567 -Action Block

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All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.