thanks everybody,

problem solved! as paul j. schindler pointed out tMacPerl cannot do ICMP echo. but tcp 
and udp
work. in my case this is enough. 

 use Net::Ping;
 $host = "foo.bar.foo.bar";

$p = Net::Ping->new("udp", 1);
print "$host$i is alive.\n" if $p->ping($host.$i);
$p->close();

$p = Net::Ping->new("tcp", 1);
print "$host$i is alive.\n" if $p->ping($host.$i);
$p->close();

the above script does the job. 

thanks everybody

jochen hagenstroem



=====
jochen hagenstroem
[EMAIL PROTECTED]

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