Fix #255

Ubuntu no longer includes the rc.local file, so iptables weren’t
applied after a system reboot.

openvpn-install.sh

@@ -36,8 +36,6 @@ elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
 	OS=centos
 	GROUPNAME=nobody
 	RCLOCAL='/etc/rc.d/rc.local'
-	# Needed for CentOS 7
-	chmod +x /etc/rc.d/rc.local
 else
 	echo "Looks like you aren't running this installer on a Debian, Ubuntu or CentOS system"
 	exit 5
@@ -311,6 +309,12 @@ crl-verify crl.pem" >> /etc/openvpn/server.conf
 	fi
 	# Avoid an unneeded reboot
 	echo 1 > /proc/sys/net/ipv4/ip_forward
+	# Needed to use rc.local with some systemd distros
+	if [[ "$OS" = 'debian' && ! -e $RCLOCAL ]]; then
+		echo '#!/bin/sh -e
+exit 0' > $RCLOCAL
+	fi
+	chmod +x $RCLOCAL
 	# Set NAT for the VPN subnet
 	iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to $IP
 	sed -i "1 a\iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to $IP" $RCLOCAL