RE: [Openvpn-users] MacOS X 10.4 No DNS issue

["glynn taylor" <gtaylor@xxxxxxxxxxxxxxx>]

-----Original Message-----
From: openvpn-users-admin@xxxxxxxxxxxxxxxxxxxxx
[mailto:openvpn-users-admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of glynn
taylor
Sent: Friday, July 01, 2005 10:38 AM
To: Angelo Laub; Jan van Rensburg
Cc: Petr Cervenka; openvpn-users@xxxxxxxxxxxxxxxxxxxxx
Subject: [Openvpn-users] MacOS X 10.4 No DNS issue

Is there a solution to the 10.4 no DNS  issue?  I have searched the
archives and revisited the web-site.  I can't find a concise solution.
We are using 2.0 on the server side and 10.4 clients, even with
tunnelblick don't work. They can connect but it is as if there is no dns
server.

Thx
gt

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More info.  Here is the up.pl script I am using (from this mailing
list).  It uses the foreign_option_X.  I have a few questions.  Does
tunnelblick call the up.pl file or does it duplicate this functionality?
I also don't know what "X" should be in the foreign_option_X.  The
script uses either 1 or 4.  I know, I'll ask Mr. Angelo Laub too.
Thanks
GT




#!/usr/bin/perl -T

use strict;
use warnings;

#
# Script to setup resolv.conf for openvpn if a nameserver is advertised
#
# Tim Bruijnzeels, 12-Jan-2005
#
my $OS;
my $resolv;
my $lookupdpid;

$OS = "OSX";
# $OS = "linux";

if ($OS eq 'OSX') {
  $resolv = "/var/run/resolv.conf"; # change to /etc/resolv.conf for
# linux
  $lookupdpid = "/var/run/lookupd.pid";
} elsif ($OS eq 'linux') {
  $resolv = "/etc/resolv.conf";
} else {
  die "Don't know that OS!\n";
}

# Get values for ns (nameserver) and dom (search domain)
my ($ns, $dom);
# Prevent warnings if the corresponding env variable aren't set
if (defined ($ENV{foreign_option_4}) ) { ($ENV{foreign_option_4} =~
/(\S+)\s*$/) and $dom = $1; }
if (defined ($ENV{foreign_option_1}) ) { ($ENV{foreign_option_1} =~
/(\S+)\s*$/) and $ns  = $1; }

%ENV=( 'PATH' => '/bin:/sbin:/usr/bin:/usr/sbin' );

sub backupResolvConf () {
  unless (system ("mv $resolv $resolv.org") == 0) { die "Can't rename
$resolv to $resolv.org\n" }
}

sub makeNewResolvConf () {
  open RESOLV, ">", "$resolv.new" or die "Can't write to $resolv.new\n";
  if ($dom) { print RESOLV "domain $dom\n"; }
  print RESOLV "nameserver $ns\n";
  close RESOLV;
  unless (system("mv $resolv.new $resolv") == 0) { die "Can't rename
$resolv.new to $resolv\n" }
}

sub restoreResolvConf () {
  if (-e "$resolv.org") {
    unless (system("mv $resolv.org $resolv") == 0) { die "Could not
restore $resolv.org\n"; }
  }
}


# The lookupd is used by many applications and caches --among other
# things -- ip addresses
sub kickCacher () {
  if (! -e $lookupdpid) { return; } # Apparently lookupd isn't running
  system ("kill -HUP `cat $lookupdpid`");
}


############################## main
##########################################
if ($0 =~ /up\.pl$/) {
  print "Bringing the VPN up\n";
  if ($ns) {
    print "Changing DNS configuration\n";
    backupResolvConf();
    sleep 3;
    makeNewResolvConf();
    if ($OS eq 'OSX') {
      sleep 1;
      kickCacher();
    }
  }
}
if ($0 =~ /down\.pl$/) {
  print "Restoring DNS configuration\n";
  restoreResolvConf(); # Won't fail if this not needed
  if ($OS eq 'OSX') {
    sleep 1;
    kickCacher();
  }
}

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