diff --git a/External-Webserver-use:-Reverse-proxy.md b/External-Webserver-use:-Reverse-proxy.md
index f953645..ca7e272 100644
--- a/External-Webserver-use:-Reverse-proxy.md
+++ b/External-Webserver-use:-Reverse-proxy.md
@@ -128,7 +128,10 @@ After installing HTTPS on the Apache, you can [set up proxy settings for Plan](h
 
 # Cloudflare Reverse-proxy
 
-Credit to [**Person0z**](https://github.com/plan-player-analytics/Plan/issues/3365) for this section
+Credit to [**Person0z**](https://github.com/plan-player-analytics/Plan/issues/3365) for this section, and [**[MACH2Simulations](https://github.com/MACH2Simulations)**](https://github.com/plan-player-analytics/Plan/issues/3439) for additions
+
+> This tutorial assumes you have set up your domain with an A-record and not a multi-level subdomain, eg plan.server.com instead of plan.sub.server.com
+> You may end up with an error of "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" if you use multi-level subdomain, which requires buying a custom certificate. That is not covered by this tutorial.
 
 ## Steps:
 1. Create a tunnel on [Cloudflare Zero Trust](https://dash.teams.cloudflare.com/).