The last time I've tried was 23:19 on 17.10.16, I used user pw: pbxes and PSK: pbxes, without success.
I know that L2TP VPN server can give the routs for using of VPN connection, for the other destinations, if the option "send all traffic over VPN connection" is off, it uses an internal routing tab, it means a regular internet connection.
So, I've tried everything. Packets to www1.pbxes.com go through the public instead of VPN, packets to www2.pbxes.com go through VPN though. All the other traffic go through default gateway. Here you are netstat -r, it's easy to see a misconfiguration in the routing: