I am looking for a quick way to scan for commonly open ports on proxies. I am doing this through php and I have been using nmap and came up with this command:<?phpsystem(nmap -PN -p U:1194,T:21,22,25,53,80,110,111,143,443,465,993,995,3306,8443,553,554,1080,3128,6515,6588,8000,8008,8080,8081,8088,8090,8118,8880,8909,1723,7080 {$_SERVER['REMOTE_ADDR']} 2>&1); ?>The problem is that it typically takes 1-2 seconds for the scans to complete, even if i just defined port 80, it's still around 1-2 seconds.However doing this in PHP will return almost instant or timeout within 0.5 seconds:    if( @fsockopen( $_SERVER['REMOTE_ADDR'], $port, $errstr, $errno, 0.5 ) )    die(php_tests_callback({success: false, message: 'Client has port $port open'}););So I am wondering if there is a more optimized way of using NMAP or an alternative program? I am almost tempted to write some sort of php forking process to run numerous fsockopens.Edit: Apparently I need to read NMAP man before I post a question. I came up with these arguments which usually get the scan down to 0.50 seconds or a tad more.:system(nmap -T5 --host-timeout 4s --min-rate 1000 -PN -p U:1194,T:21,22,25,53,80,110,111,143,443,465,993,995,3306,8443,553,554,1080,3128,6515,6588,8000,8008,8080,8081,8088,8090,8118,8880,8909,1723,7080 {$_SERVER['REMOTE_ADDR']} 2>&1); However,  I am still open to other suggestions/applications.
Fastest way to port scan. NMAP?
proxy;nmap
Take a look at the Rainmap Web-hosted Nmap scanner. It was developed as a Google Summer of Code project 2 years ago under the guidance of the Nmap development team