diff --git a/README.md b/README.md
index a05ccf4..9bfb640 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ If you have any question, head to the [FAQ](#faq) first.
 
 ### Headless install
 
-It's also possible to run the script headless.
+It's also possible to run the script headless, e.g. without waiting for user input, in an automated manner.
 
 Example usage:
 ```bash
@@ -51,11 +51,13 @@ export PROTOCOL_CHOICE=1
 export DNS=1
 export COMPRESSION_ENABLED=n
 export CUSTOMIZE_ENC=n
-export CLIENT=clientName
+export CLIENT=clientname
 export PASS=1
 ./openvpn-install.sh
 ```
 
+If the server is behind NAT, you can specify its endpoint with the `PUBLICIP` variable. It the endpoint is the public IP address which it is behind, you can use `export PUBLICIP=$(curl ifconfig.co)`.
+
 ## Features
 
 - Installs and configures a ready-to-use OpenVPN server