I think the problem is that you're using the same Net::SSH2 object ($ssh) to connect to different hosts, though it's not exactly clear to me that this *ought* to be a problem at all.
Try the below rendition (untested). It creates a new Net::SSH2 object for each host. 
use strict;
use Net::SSH2;
my $hf = 'list.txt';
my $user = 'user';
my $pass = 'pass';
open (L,"<$hf") || die "$!";
while(<L>) {
  chomp $_;
  my $ssh = Net::SSH2->new();
  $ssh->debug(1);
  print "Connecting now..\n";
  $ssh->connect("$_") || warn "$!";
  $ssh->auth_password("$user","$pass");
  my $chan = $ssh->channel();
  $chan->exec('dir');
  $chan->close();
  undef $ssh;
}
close L;

[download]
Perhaps the undef $ssh; is unecessary.

Cheers,
Rob

In reply to Re: Net::SSH2 woes by syphilis
in thread Net::SSH2 woes by vdubjunkie

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