What must be configured to establish a secure connection between two networks in a SonicWall firewall?

To establish a secure connection between two networks in a SonicWall firewall, configuring a Site-to-Site policy is essential. This type of policy allows two separate networks to communicate securely over the internet using a Virtual Private Network (VPN) tunnel. By creating a Site-to-Site VPN, you ensure that the data transmitted between these two networks is encrypted, which protects against unauthorized access and eavesdropping.

A Site-to-Site policy involves specifying the details of the VPN connection, including the peer IP address (the other network’s firewall), shared secrets (encryption keys), and the protocols to be used. This setup is vital for organizations that require secure remote access to their network resources or for connecting branch offices securely.

While the other options might be relevant in different contexts—such as public servers being used for different applications or SD-WAN for optimizing connectivity—none provide the specific framework required for securely linking two separate networks like a Site-to-Site policy does. Similarly, a static route may facilitate routing between networks but does not inherently include the security features necessary for a secure connection.