Patent ID: 11916957
Assignee: AIRGAP NETWORKS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A system for ransomware protection in a Virtual Local Area Network (VLAN) network, comprising:
a security appliance acting as a Dynamic Host Configuration Protocol (DHCP) relay for a DHCP server in the VLAN network;
the security appliance serving as the default gateway for a plurality of endpoint devices of the shared VLAN network by the security appliance, overwriting a subnet mask to 255.255.255.255 of responses to the DHCP server to set the security appliance as a default gateway; and
the security appliance further policing DHCP Internet Protocol (IP) address assignments by intercepting, by the security appliance, DHCP packets between the DHCP server and endpoint devices and policing, by the security appliance, 1) IP addresses requested by client endpoint devices, and 2) IP addresses proposed by the DHCP server, wherein the policing of IP address assignments by the security appliance is selected to aid in protecting the security of the endpoint devices from ransomware.