To get access to router's GUI from WAN try:
If it does not work, executeCode:iptables -I INPUT -p tcp --dport 1024 -j ACCEPT
and paste the result here.Code:iptables -L INPUT -n -v
Regarding the dependencies you are having with OpenVPN and the mounting of drives, it sounds to me OpenVPN is configured to run something on one of the drives to mount, e.g. OpenVPN log. Try to configure OpenVPN so it is not depending on any drive to mount.