alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Generic ADSL Router DNS Change Request"; flow:established,to_server; http.uri; content:"dnsPrimary="; fast_pattern; content:"dnsSecondary="; content:"Enable_DNSFollowing=1"; classtype:attempted-user; sid:2025222; rev:5; metadata:affected_product D_Link_DSL_2640R, attack_target IoT, created_at 2018_01_19, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_03_07;)