I am trying to cook up something to check the availability of the following ports on a list of hosts:

22
13724
1556
30031
30032
13720
13782

I want to run through a list and check that all of the IP addresses list can be reached via IP on all of the ports listed above. The script needs to run all the way through whether an individual command passes or fails and needs to report something like:

Hostname
22 - yes
13724 - yes
1556 - yes
30031 - no
30032 - yes

I know I can use IO::Socket::PortState
use strict;
   use warnings;
   use IO::Socket::PortState qw(check_ports);

   my %porthash = ( ... );

   check_ports($host,$timeout,\%porthash);

   for my $proto (keys %porthash) {
      for(keys %{ $porthash{$proto} }) {
         print "$proto $_ is not open ($porthash{$proto}->{$_}->{name}
+) if !$porthash{$proto}->{$_}->{open};
      }
   }

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But I want it to run thru a list and jump to different machines like so 
#!/usr/bin/perl -w

open  (IN,  "<hostnames.txt" ) || die "Cant open users.txt";

 while(<IN>) {
  chomp;
  system("telnet  $_");  ### get return status here??
}

[download]

In reply to Testing for port connectivity by Anonymous Monk

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