Which option is not valid for configuring VPN Tunnel sharing?

When configuring VPN Tunnel sharing in Check Point, various methods can be used to determine how the traffic is shared among different gateways. Among the given options, subnet-based, host-based, and gateway-based are all valid configurations for VPN Tunnel sharing.

Gateway-based VPN Tunnel sharing allows multiple gateways to share a single VPN tunnel, which enhances reliability and failover capabilities in a network. Subnet-based sharing enables multiple subnets to route traffic over a single VPN tunnel, optimizing throughput. Host-based configurations involve specific hosts connecting through the same tunnel, generally based on the source and destination IPs of the traffic.

On the other hand, IP Range based sharing is not a recognized method for configuring VPN Tunnel sharing within Check Point's architecture. This means that using an IP range to define shared tunnel behavior does not align with the built-in functionalities and guidelines provided by Check Point for VPN configurations. Therefore, this method does not exist within the valid settings for VPN Tunnel sharing.