I've written a daemon process, that regularly fetches some urls from the net. When my ppp-link goes down "ifdown ppp0" and I reconnect to a different provider "ifup ppp1" (different IP-address and nameservers), my script keeps failing to fetch those urls. A simple restart of my script makes it work again. I could reduce the script to: 
use Net::Ping;
while (1) {
  my $p = Net::Ping->new(udp);
  if $p->ping($host) {
    print "success\n";
  } else {
    print "failed\n";
  }
  undef $p;
  sleep 3;
}

[download]
or 
use LWP::Simple;
while (1) {
  my $content = get($url);
  if (defined $content) {
    print "success\n";
  } else {
    print "failed\n";
  }
  sleep 4;
}

[download]
How can I fix my script, so I don't have to restart it, if I need to change my ppp-link?

In reply to perl daemon surviving changing ppp-links by raphi72

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