- Patch VPN gateways quickly: they are a top initial access target.
- Use certificates or MFA rather than shared secrets.
- Investigate unexpected tunnels and proxies: they are also attacker tools.
Port 8567: DOF Tunneling Protocol
Port 8567 is assigned by IANA to dof-tunnel (DOF Tunneling Protocol).
8567
How dof-tunnel works
VPN, tunnels & proxiesTraffic is wrapped in a tunnel between the two ends, so the network in between only sees the tunnel.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- VPN, tunnels & proxies
Is port 8567 dangerous?
We have no specific security note for port 8567. Its risk depends on the program actually listening on it. General advice for vpn, tunnels & proxies services:
IANA registry entries for port 8567
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| dof-tunnel | 8567 | TCP, UDP | DOF Tunneling Protocol | - | 2015-04-23 |
// source: IANA service name and port number registry
Which program uses port 8567, and is it reachable?
Linux
sudo ss -ltnup 'sport = :8567' # process listening on 8567
sudo lsof -nP -i :8567macOS
sudo lsof -nP -i :8567
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8567 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 8567 netstat -ano | findstr :8567
From another machine
nmap -p 8567 -sV <host> sudo nmap -sU -p 8567 <host> nc -zv <host> 8567
Block it in the firewall
sudo ufw deny 8567/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 8567" -Direction Inbound -LocalPort 8567 -Protocol TCP -Action Block # Windows
What is port 8567 used for?
Port 8567 is assigned by IANA to dof-tunnel (DOF Tunneling Protocol).
Is port 8567 TCP or UDP?
Port 8567 is registered for TCP and UDP.
Is it safe to open port 8567?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Patch VPN gateways quickly: they are a top initial access target.
How do I check if port 8567 is open?
On Linux run "ss -ltnup 'sport = :8567'", on macOS "lsof -nP -i :8567", and on Windows "netstat -ano | findstr :8567" to see the local process. From another machine, "nmap -p 8567 <host>" shows whether it is reachable.