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doc/user/project/pages/custom_domains_ssl_tls_certification/lets_encrypt_integration.md

@@ -21,6 +21,9 @@ such as [#64870](https://gitlab.com/gitlab-org/gitlab-ce/issues/64870).
 See all the related issues linked from this [issue's description](https://gitlab.com/gitlab-org/gitlab-ce/issues/28996)
 for more information.
 
+Note: **Note:**
+Using this feature requires **2 IP addresses** to be configured to the machine.
+
 ## Requirements
 
 Before you can enable automatic provisioning of a SSL certificate for your domain, make sure you have: