ERROR: Not a IPv4-Address: " , $ipOut , ""; exit; } $ips = explode( "\n" , `/opt/fwlist` ); foreach( $ips as $ip ) { $ip = trim( $ip ); if( $ip ) { if( false === strpos( $ip , '/' ) ) { $ip = $ip . '/32'; $firstIP = ip2dec( $ip ); $lastIP = $firstIP; $netMask = 32; } else { list ( $firstIP, $netMask ) = explode( '/' , $ip ); $firstIP = ip2dec( $firstIP ); $lastIP = $firstIP + pow( 2 , 32-$netMask ); } if( $_GET['check'] >= $firstIP && $_GET['check'] <= $lastIP ) { header( 'Content-Type: text/plain' ); echo 'BLOCKED'; exit; } } } header( 'Content-Type: text/plain' ); echo 'NOT BLOCKED'; exit; function ip2dec( $ip ) { return sprintf( '%u', ip2long( $ip ) ); }