[Openvpn-users] Adding remote DNS server for OS X client

[Stephen Woolerton <sdw2@xxxxxxxxxxxxxxxxx>]

Hi All,

Looking through the list and it appears setting that questions re 
setting DNS for an OS X client have been asked a few times but I haven't 
seen a response.

http://www.macosxhints.com/article.php?story=20050621051643993
http://www.afp548.com/article.php?story=20050703052052393
http://njr.sabi.net/2005/08/04/overriding-dns-for-domains-in-os-x-tiger/

Some googling later and as per the links above I find I can set DNS 
servers from the command line. The issue I have is that setting DNS only 
works using sudo. However, Tunnelblick doesn't have a mechanism to ask 
for a sudo password. I find that if I add a script to add in the remote 
site DNS server at time of connection then Tunnelblick fails on opening 
the connection (icon stops flashing), presumably because of the sudo 
requirement.

I've included a script to set the DNS server below. If someone could 
give an idea of how to get around or work with the sudo script 
requirement and Tunnelblick it would be very helpful.

Thanks
Stephen



Script to set DNS; requires sudo to run
---------------------------
#!/bin/bash

# Script is used to set the Nameserver Lookup under Max OS X 10.4 with 
the Console
# Script by Stephan Oeste <stephan-at-oeste-dot-de>

if [ $# -lt 2 ] ; then
echo "Use: $0 <domain> <1.Nameserver> [2.Nameserver]"
echo "Example Use: $0 example.tld 1.2.3.4 1.2.3.5"
exit 1
fi

PSID=$( (scutil | grep PrimaryService | sed -e 's/.*PrimaryService : 
//')<< EOF
open
get State:/Network/Global/IPv4
d.show
quit
EOF
)

scutil << EOF
open
d.init
d.add ServerAddresses * $2 $3
d.add DomainName $1
set State:/Network/Service/$PSID/DNS
quit
EOF
-----------------------

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