Mac OSX connects to an L2TP-based VPN without a shared key

When Mac OSX has no shared key, it takes some time to connect to a VPN based on L2TP to replace Mac Pro. Today, you need to configure the VPN (based on the IPSec protocol of L2TP ), an error occurred while clicking "IPSec shared key" after the previous windows configuration was installed based on the Huludao image watermark configuration. Verify your settings and try again. However, no shared key is required for this vpn, and I do not have the shared key. I searched for Mac OSX to modify the configuration to bypass it. Create an options: 1cd/etc/ppp2sudo vi options file in the/etc/ppp directory. The writer is as follows: plugin L2TP. pppl2tpnoipsec is saved and then exited. In the last step, Hook "send all traffic through VPN connection" in the advanced settings. Then click Connect.