After configuring the Routing and Remote Access Services to be a both VPN and NAT service, I cannot ping that server anymore from the external side. But when I configure it to be just a VPN server, or just a NAT server, I do able to ping it from the external side.
My configuration is like:
DC: 192.168.20.11 VPN and NUT: Nic 1: 192.168.20.1, NIC 2: 192.168.147.171 Client: 192.168.147.1
The mask is always: 255.255.255.0
I cannot understand why when configuring the VPN server to be a VPN and NAT, I cannot ping the server anymore.