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This perl script shows how to automate the backup of the config for a NAS I bought (Sans Digital MN2LP).
  #!/usr/bin/perl -w

  # by Michael Mayer-Oakes
  # 6/14/2009

  use strict;
  use CGI qw/-no_xhtml :form :cgi :escapeHTML/;
  use WWW::Mechanize;
  use diagnostics;

  # change these
  use constant BASEFOLDER => '/save/to/folder'; # where to save the config.ccyymmddhhmmss.tar file
  my ($username, $password) = ('username', 'password'); # login to MN2LP 
  my $mn2lp = "mn2lp.yourdomain.com"; # could be an IP address as well

  my $cgi = new CGI;
  my $mech = WWW::Mechanize->new(onwarn => undef);

  $mech->credentials($username, $password);
  my $url = 'http://'.$mn2lp.'/cgi/saveConfig/saveConfigHandler.cgi';
  $mech->get($url); # force config.tar to be rebuilt
  
  $url = 'http://'.$mn2lp.'/config.tar';
  $mech->get($url); # get config.tar
  # debug
  #print $mech->status()."\n";
  #print $mech->content_type()."\n";

  # generate name of file, config.(datetime).tar
  my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time);
  $year += 1900; # adjust to actual year not just offset from 1900
  $mon += 1; # change range to 1..12
  $mon = sprintf("%02d", $mon);
  $mday = sprintf("%02d", $mday);
  $hour = sprintf("%02d", $hour);
  $min = sprintf("%02d", $min);
  $sec = sprintf("%02d", $sec);
  my $filename = BASEFOLDER.'/config.'.$year.$mon.$mday.$hour.$min.$sec.'.tar';
  # debug
  #print $filename."\n";

  # create file
  open(FH, ">", $filename) || die "$0 Can't create $filename: $!\n";

  # use write contents
  print FH $mech->content();

  # cleanup
  close(FH);

  # end of script
  
This along with a cron entry, something like so
30 0 * * * /path/to/script/backup.pl
And you are ready to go with your automated backup of the MN2LP's config