luci-app-internet-detector/root/usr/share/rpcd/acl.d/luci-app-internet-detector.json

{
	"luci-app-internet-detector": {
		"description": "Grant access to internet-detector procedures",
		"read": {
			"file": {
				"/bin/ping -c 1 -W 1 [a-z0-9:.]*": [ "exec" ]
			}
		}
	}
}