I got the correct parameters, 

$p->port_number("3000", "tcp");

[download]

Explanation:

getservbyname function takes the first parameter and sends its defined port to tcp. E.g., "ftp" => 22, "http" => 80 If custom port is to be mentioned, dont use "getservbyname".

Correct me if my understanding is wrong.

Thanks guys for all the help. BTW, the response time now is "5secs for 50 IP's" GREAT Response time. :-)

In reply to Re^3: Optimized remote ping (syn/ack) by themonk
in thread Optimized remote ping by themonk

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