@Somnus Hi I'm referencing a solution by Draytek. They use PPTP VPN solution. I see they are using Open port solution for 4G Router running VPN client and having "IPsec NAT-traversal (NAT-T)" feature...

Dear All, I have this topology. ER7206 - V1 MR6400- V5.30 I want to configure IPsec VPN, is it possible? If it ok, please help me

@Virgo I don't use anti-virut software and I already disable firewall on computer.

@Virgo normal ping

I'm only using the model EAP 245, not use tp-link sw, gateway. Recently it's disconnected but normal internet