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# Firewall

OpenPanel supports ConfigServer Security and Firewall (CSF).

## CSF

Firewall (CSF) UI is displayed on **OpenAdmin > Firewall**.

For instructions on how to use the CSF UI, please refer to [ConfigServer Security & Firewall official documentation](https://download.configserver.com/csf/readme.txt).

![csf firewall](/img/admin/firewall_csf.png)

If you need to re-open all necessary ports for OpenPanel services and users, run the command: `opencli firewall-reset`.


## External Firewall

Some cloud providers, like [Hetzner](https://docs.hetzner.com/robot/dedicated-server/firewall/), offer their own external firewalls. If you are using an external firewall, ensure the following ports are open for OpenPanel services to be accessible: `53` `80` `443` `2083` `2087` `32768:60999`

If you are [using a custom port for OpenPanel instead of the default 2083](/docs/admin/settings/general/#change-openpanel-port), ensure that port is open as well.