VPN Clients DNS Issue

Sorry for the repost. I took to long to respond and the post fell behind.

Hi All,

I am having an annoying issue with my VPN clients. I have our webmail
configured to resolve from both external and internal clients.
https://webmail.domain.com. Internally it resolves to a 192.168.8.103 IP
address and externally it resolves to a 74.x.x.x address. The problem is
when my VPN clients remote in for some reason they are not using our local
DNS and they are resolving to our external DNS IP. Our firebox isn't
letting local traffic access a WAN IP address so the users are getting a
request timed out. How can I force a remote user to use a local DNS server
when remoted in?

It is a PPTP client connecting to a Watchguard Firebox. When the client
connects to the VPN they receive our LAN DNS servers as both the primary and
secondary DNS servers on the VPN connection. I disabled DNS cache and tried
again but it resolved to the same thing. When I do an nslookup on the
client it shows that the default DNS server is the DNS server that is local
to the VPN client and not our network. How can I force a DNS server once
connected to a VPN? Is there a DNS server metric?

Thanks,

Dave
A+, Network+, MCP++++++


.

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