diff --git a/openvpn-install.sh b/openvpn-install.sh
index 0b52d7c..849528f 100755
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -26,6 +26,7 @@ fi
 IP=$(ifconfig | grep 'inet addr:' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d: -f2 | awk '{ print $1}')
 if [ "$IP" = "" ]; then
         IP=$(wget -qO- ipv4.icanhazip.com)
+        EXTERNALIP=$IP
 fi
 
 
@@ -179,7 +180,7 @@ else
 	mkdir ~/ovpn-$CLIENT
 	# Try to detect a NATed connection and ask about it to potential LowEndSpirit
 	# users
-	EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
+	if [ -z "$EXTERNALIP" ]; then EXTERNALIP=$(wget -qO- ipv4.icanhazip.com); fi
 	if [ "$IP" != "$EXTERNALIP" ]; then
 		echo ""
 		echo "Looks like your server is behind a NAT!"
@@ -209,4 +210,4 @@ else
 	echo ""
 	echo "Your client config is available at ~/ovpn-$CLIENT.tar.gz"
 	echo "If you want to add more clients, you simply need to run this script another time!"
-fi
\ No newline at end of file
+fi