Initial configurations (only once at the first time) Click the network icon on the top-right side on the Mac screen. Click 'Open Network Preferences.'
Click the '+' button on the network configuration screen. Select 'VPN' as 'Interface', 'L2TP over IPsec' as 'VPN Type' and click the 'Create' button.
I have set up a Cisco IPSec VPN connection instead of using the Cisco client on Mac OS X. I like it fairly well, it just sits in the tray next to the clock and allows me to easily connect and disconnect. Set Source to all, Destination Address to all, Schedule to always, and Service to ALL. Enable NAT and select OK. Results: On the Mac, go to System Preferences > Network and select the Plus (+) button. Set Interface to VPN, set VPN Type to Cisco IPsec, and select Create.
A new L2TP VPN configuration will be created, and the configuration screen will appear. On this screen, you have to specify either hostname or IP address of the destination SoftEther VPN Server. After you specified the 'Server Address', input the user-name on the 'Account Name' field, which is the next to the 'Server Address' field. Next, click the 'Authentication Settings.' The authentication screen will appear. Input your password in the 'Password' field. Specify the pre-shared key also on the 'Shared Secret' field.
After you input them, click the 'OK' button. After return to the previous screen, check the 'Show VPN status in menu bar' and click the 'Advanced.' The advanced settings will be appeared. Check the 'Send all traffic over VPN connection' and click the 'OK' button. On the VPN connection settings screen, click the 'Connect' button to start the VPN connection.