SonicWall VPN DNS refresh problems

From: Patrick Moreau (
Date: 04/20/04

Date: 20 Apr 2004 09:55:38 -0700


First please do not reply to this email address as it no longer
exists, just post back to the newsgroup.

I have a problem with this VPN configuration:
- We have a SonicWall 230 Pro
- We use the SonicWall Global VPN Client on our home Windows XP
- When connected the SonicWall network adapter does show up as being
properly configured; meaning it has a valid IP and its DNS server
entries are also properly configured. I am also able to ping the DNS
servers from the VPN connection.

The problem is the following: when we connect to the VPN to access our
office network the DNS cached entries are never refreshed when we
connect. So when ever a computer ends its IP lease from our DHCP the
home computer will not know about it. So trying to access a computer X
which had the IP but with its new lease got the IP will not work, pinging the computer X will comeback as
unreachable from IP when in fact its IP changed.

Now if I do a "ipconfig /flushdns" and "ipconfig /registerdns" all the
DNS entries from our DNS server are refresh and I can now access X,
but asking all my users to do the same is a bit of a problem.

Any ideas how to resolve this??


Patrick Moreau