Region : Argentina

Model : TD-W8968

Hardware Version : V1

Firmware Version : 0.6.0 2.12

ISP :

Hi,
I have got the TD-W8970 recently.
I would love to configure VPN access, so that I can put my mobile phone when away from home into my home network.

I have configured dynamic dns on both the adsl modem and the android mobile phone.

1. Is there a VPN client software you recommend or should the default VPN client software of Android 4.3 (Samsung Galaxy Grand 2) do it?

2. As the phone gets a random public IP from the provider when using mobile data connection, what do I have to configure in "Tunnel access from remote IP addresses"?

3. Is "Key Exchange Method" set to "Auto(IKE)" ok? The mobile phone lists e.g. L2TP/IPSec with preshared key but not IKE or just IPSec ...

4. No "Perfect Forward Secrecy" on mobile phone - what shall I put in here on the adsl modem router?

Thanks for your help.
Kind regards
panmeri