Dial-out netshserver vpn to another firewall vpn NOT STABLISHED

NethServer Version: NethServer release 6.8
Module: vpn

Hi everyone, I have configured a vpn tunnel between a draytek router and a netshserver. If I ping the draytek to a remote Nethserver ip the tunnel is stablished perfectly. But if I ping from Nethserver the tunnel is not set. I have reviewed the configuration of Netshserver and I can not find configuration.

Could someone help me?

Thanks

Is the Draytek’s LAN into the trusted networks?.
Is the routing table correct?

What Draytek model are you using?