use the NETBIOS over IP port "137" or "138" or "139" and do just a simple
TCP three way handshake to find out is he remote site reachable. This is
possible by using Net::Ping Regarding working in parallel with multiple
hosts I do it like this (please take care to work with a appropriable amount
of host in the same time)(I'm using not more then 300 per time)
use Net::Ping;
use threads;
my @HOST = ("1.2.3.4", "2.3.4.5", "3.4.5.6");
# start
threads->new( \&touchHost, $_) foreach (@HOSTS);
# wait for ending
$_->join() foreach $_ (threads->list());
#########################
#
sub touchHost{
my $host = shift;
my $tid = threads->self->tid(); # get thread ID
my $p = Net::Ping->new('tcp', 2);
$p->hires();
$p->{port_num} = '138';
my ($ret, $duration, $host) = $p->ping($ip);
$p->close();
if($ret){
$result = sprintf("%.3f", 1000 * $duration);
print "[$tid]\t measured round trip delay is $result ms\n"
}else{
print "[$tid]\t host '$host' not reachable\n";
return;
}
# do what ever you like to do.
}
Markus
-----Ursprüngliche Nachricht-----
Von: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Im Auftrag von
Ng, Bill
Gesendet: Freitag, 12. Mai 2006 17:27
An: [email protected]
Betreff: Network Timeouts
Dilemma,
I have many scripts that have to hit every machine in my domain
.. about 2400. I can't use Net::Ping to test the alive status of the
boxes because our internal DNS system is a real PITA to clean up and
using as-is will leave me with bad results.
For now, I'm doing a write test: if (open (WRITETEST,
">c:\write.test")) { &doSomething(); } ... but the timeout on such a
test, if the machine its trying to reach is not available, is just too
long.
Anyone have a way of me testing the connectivity to a computer
on the network that allows me to either configure the timeout or has one
between 1 and 2 seconds?
Bill in Brooklyn
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