> For the complete documentation index, see [llms.txt](https://platform9.com/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://platform9.com/kb/generic/frequently-asked-questions/how-do-i-block-access-to-the-platform9-management-plane.md).

# How do I Block Access to the Platform9 Management Plane?

## Problem

For testing purposes, how do I block access to the Platform9 Management Plane?

## Environment

* Platform9 - All Versions
* Comms

## Answer

{% hint style="warning" %}
**Warning**

**Attention:** The following will cause your Platform9 nodes to show as "Disconnected" in the UI, and, while resources/workloads will continue to be running, management of the node and/or those same workloads, etc. may not be possible.
{% endhint %}

The `pf9-comms` component on each host/node communicates with the Platform9 Management Plane FQDN via TCP/443. Access may need to be blocked to the multiple IPs which the FQDN resolves to (which can be found via `nslookup` or `dig` , for example).

Platform9 only uses TCP/443 and no other ports need to be blocked.


---

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