alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY External Geo IP Lookup (api .db-ip .com)"; flow:established,to_server; http.method; content:"GET"; http.host; content:"api.db-ip.com"; endswith; http.header_names; content:!"Referer"; classtype:policy-violation; sid:2027915; rev:4; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2019_08_26, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2020_09_17;)