Question : DNS using VPN tunnel

We have a VPN tunnel with a partner company.  When the tunnel was first set up we were directed to create a DNS zone on our DNS server with all of the partner sites listed.  This zone only has the private sites for the tunnel.  We solved the basic www.partner.com site by adding an A record for it within our DNS server.  There are now several hundred DNS records that are sent down the tunnel.  We now have many public sites that we are not aware of until a user complains that they cannot access abc.partner.com site.  We then have to look up the A record and add it to our DNS zone.  The partner company will not or does not have a DNS server within the VPN tunnel.  Is there a way to forward queries to a public DNS server for the sites that we do not have in our DNS zone?

Answer : DNS using VPN tunnel

No but...

If you delete the current zone and make a new one called "www.partner.com" then you'll only respond to requests for that specific site rather than everything under "partner.com". In that scenario everythign else would go resolve via the public name servers as normal.

This, of course, assumes that you only need the one site to go down the VPN tunnel?

Chris