# Open Port 2375 for Docker API

1. Create `daemon.json` file in `/etc/docker`:
    
    ```
     {"hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]}
    ```
2. Add `/etc/systemd/system/docker.service.d/override.conf`
    
    ```
     [Service]
     ExecStart=
     ExecStart=/usr/bin/dockerd
    ```
3. Reload the systemd daemon:
    
    ```
     systemctl daemon-reload
    ```
4. Restart docker:
    
    ```
     systemctl restart docker.service
    ```
5. firewall

```
ufw allow 2375/tcp
ufw reload
```