Under which file is the proxy ARP configuration stored?

The proxy ARP configuration is stored under the file located at $FWDIR/conf/local.arp on the gateway. This file is specifically utilized to define which IP addresses should be responded to by the Security Gateway for ARP requests.

Proxy ARP allows a gateway to answer ARP requests on behalf of another host, enabling it to respond to requests that it does not own directly. By maintaining this configuration at the gateway level, it ensures that the device can manage ARP requests and responses effectively within the network segment it serves. The local.arp file is crucial for the gateway's operation as it contains static mappings that correlate IP addresses with the gateway's own MAC address.

Contextually, while files like proxy_arp.conf and those in the _tmp directory are relevant for other configurations and temporary states, they do not specifically pertain to the static ARP entries that the gateway must manage for proxy ARP functionality. Thus, local.arp holds the definitive configurations for ARP responses directly managed by the gateway.