DNS resolution

[esj]

I'm not getting the name resolution I expect consistently across a
small set of OS X systems. For example, a laptop with 10.4.something
when connecting via open VPN can resolve names on the core network.
But other machines of roughly the same vintage as well as 10.5 doesn't
even see the name server on the far end.

keeping in mind that I'm not that Mac fluent, what should I be looking
for?

[jkbull...gmail.com]

Four things to check:

1. Make sure all machines are using DHCP for DNS, not manually-set DNS
(look in System Preferences / Network; 10.4 and 10.5 are slightly
different). If you have manually-set DNS, Tunnelblick does not
override it. It does override DHCP-set DNS.

2. Make sure the configuration files are identical on all the
machines. They are the .ovpn or .conf file(s) in ~/Library/openvpn.
(The "~" is your home directory).

3. Make sure that "Set nameserver" is always checked when you make
your connections. (Or, less likely, never checked; it should be
consistent, in any case.) "Set nameserver" is a checkbox on the
"OpenVPN Log" window. To get to it, click the Tunnelblick icon, then
click "Details...".

4. Make sure you are using the same version of Tunnelblick on all
machines -- 3.0b16 is the latest. In the newest versions, click the
Tunnelblick icon, then click "About..." to find out what version is
being used.