Configuring IPsec tunnel

Now that you're familiar with the IPsec concepts, let's go ahead and implement a new IPsec tunnel in the pfSense server:

1. Login to pfSense by inputting credentials and go to the pfSense dashboard.
2. Now, let's go ahead and configure a new IPsec tunnel. Let's click VPN on the top toolbar, and click IPsec.

As you will see, right now there are no IPsec VPN tunnels configured here:

For this example, let's assume that this particular instance of pfSense is installed in Site A.

3. Under the Tunnels tab, click the Add P1 button. P1 here refers to Phase 1. Ensure that the Disabled checkbox is not checked, otherwise the IPsec tunnel will not be enabled:

pfSense will suggest default values for most of these settings related to IPsec. The Internet Protocol for this IPsec tunnel is IPv4, which is what you want. The Interface is WAN1, which...