Quick re-write which tries to straighten out that problem others have described: 
#!/usr/bin/perl

use strict;
use warnings;
 
use IO::Socket::INET;
 
my @host = qw[ 192.168.1.3 192.168.46.2 ];
my $port = 22;
 
foreach (@host)
{
     check($_, $port);
}
 
sub check {
     my ($ip, $port) = @_;

     my $sock = IO::Socket::INET->new(
                         PeerAddr => $ip,
                         PeerPort => $port,
                         Proto    => 'tcp',
                         timeout  => 10,
     );
 
     if ($sock) {
          print "$ip is listening on port $port\n";
          return 1;
     }

     print "$ip is NOT listening on port $port.\n";
     return;
}

[download]
Since $sock is either defined or not, there's no real need for a $connected variable. Likewise, in the interest of reducing global variable propagation, it's better to pass $port explicitly.

You also don't need to quote numbers. Not that it's a huge difference, but it looks odd.

In reply to Re: Using 'and' by tadman
in thread Array Woes by dru145

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