LAN, virtual VPN apache2 rewrite link address

CiviCRM 4.6.6 on Drupal 7.41 running through Apache2 on Linux Mint 17. This is not a publicly accessible site.

If I am on the LAN I can access CiviCRM and all the links work:

10.141.229.171/?q=civicrm/dashboard

I have a virtual VPN and when I connect I get to log into CiviCRM but the links and requests all go to the LAN address so the system fails to work.

10.12.0.23/?q=civicrm/dashboard

I know that the CiviCRM internal links are set to the 10.141.229.171 address but I would like my VPN clients to access the site as well.

The best I can come up with is that I need to:

On my VPN computer any link for 10.141.229.171/page_name gets rewritten to be sent as 10.12.0.23/page_name

On the server any request for 10.12.0.23/page_name gets rewritten to be 10.141.229.171/page_name

Unfortunately I am struggling to find out how to do that. Is it even the right way? Can it be done in any way?

Thank you in advance for any help you can provide. John in Oregon, US

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http://httpd.apache.org/docs/2.0/misc/rewriteguide.html