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

Claim 0:
1. A computer-implemented method of ransomware protection in a Virtual Local Area Network (VLAN) network, comprising:
configuring a security appliance as a DHCP relay for a Dynamic Host Configuration Protocol (DHCP) server in the VLAN network;
receiving, by the security appliance, responses from the DHCP server to DHCP requests and the security appliance further overwriting a subnet mask associated with the responses to 255.255.255.255 to set the security appliance as a default gateway for a plurality of endpoint devices of the VLAN network; and
intercepting, by the security appliance, DHCP packets between the DHCP server and endpoint devices and policing, by the security appliance, 1) Internet Protocol (IP) addresses requested by client endpoint devices, and 2) IP addresses proposed by the DHCP server; and
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.