Review the explanation for detailed answer steps.
Explanation/Reference:
Explanation:
First, click on Configuration ->Site-to-Site VPN to bring up this screen:

Click on "allow IKE v1 Access" for the outside per the instructions as shown below:

Then click apply at the bottom of the page. This will bring up the following pop up message:

Click on Send.
Next, we need to set up the connection profile. From the connection profile tab, click on "Add"

Then, fill in the information per the instructions as shown below:

Hit OK and you should see this:

To test this, we need to disable NAT. Go to Configuration -> Firewall -> NAT rules and you should see this:

Click on Rule 1 to get the details and you will see this:

We need to uncheck the "Enable rule" button on the bottom. It might also be a good idea to uncheck the
"Translate DNS replies that match the rule" but it should not be needed.
Then, go back to the topology:

Click on Employee PC, and you will see a desktop with a command prompt shortcut. Use this to ping the IP address of 10.11.11.20 and you should see replies:

We can also verify by viewing the VPN Statistics -> Sessions and see the bytes in/out incrementing as shown below:

