If you want ot try an ICMP udp ping, it might be easier to use the Net::Ping module: 
use Net::Ping;

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

[download]

-Mark

In reply to Re: How read ICMP UDP port unreachable? by kvale
in thread How read ICMP UDP port unreachable? by Anonymous Monk

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