alert http any any -> $HOME_NET any (msg:"ET EXPLOIT Unknown Router Remote DNS Change Attempt"; flow:established,to_server; urilen:10; http.method; content:"POST"; http.uri; content:"/setup.htm"; nocase; http.request_body; content:"wan_proto=dhcp"; nocase; content:"dhcps_dns_1="; nocase; fast_pattern; content:"dhcps_mode=enabled"; nocase; content:"lan_proto=enable"; nocase; http.header_names; content:!"Cookie|0d 0a|"; content:!"Authorization|0d 0a|"; classtype:attempted-admin; sid:2023468; rev:6; metadata:attack_target Client_Endpoint, created_at 2016_10_31, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2020_11_19;)