diff --git a/charts/stable/zerotier/docs/How-To-Guide.md b/charts/stable/zerotier/docs/How-To-Guide.md
index 79ec97f0add..e66a9b300cc 100644
--- a/charts/stable/zerotier/docs/How-To-Guide.md
+++ b/charts/stable/zerotier/docs/How-To-Guide.md
@@ -11,10 +11,25 @@ This is a quick how-to or setup-guide to use Zerotier.
 
 ## Prerequisites (LAN access only)
 
+### Zerotier Network ID
 Prepare your Zerotier Network ID for your setup, easy to create and copy at [https://my.zerotier.com](https://my.zerotier.com)
 
 ![Zerotier Network ID](./img/Network-ID.png)
 
+### Sysctl
+:::note[sysctl]
+
+This part is not needed for CLustertool setup with TalosOS.
+
+:::
+
+
+At some OS's it is required to set two `sysctl` values for proper acces to your local network (LAN). Check your OS documentation how this needs to be done.
+```
+net.ipv4.ip_forward = 1
+net.ipv4.conf.all.src_valid_mark = 1 
+```
+
 ## Zerotier Chart Setup
 
 Ideally name your chart `zerotier`.