Small change : I can ping the local IP but no the remote local IP.

Hi ! I'm trying to connect a TP-LINK TL-R600VPN (client) to a Microsoft Windows Server 2016 (L2TP and IPSEC VPN server). In the VPN client, when I choose "NAT" working mode everything works properly....

Hi Panda, Yes, there is a NAT on each side (my provider VDSL2 BOX) and a DMZ pointing to the each TL-R600VPN WAN interface. I also configured virtual servers in the VPN routers to point to the WAN IP...

Hi, I had some troubles establishing an L2TP/IPSec tunnel between two TL-R600VPN v4 when I saw on your support website a new firmware which says : "Fix bugs that it cannot establish L2TP over IPsec...