DNS resolves wrong when vpn connects

[Guest]

Archived from groups: microsoft.public.win2000.dns (More info?)

remote clients connect to vpn fine. Ipconfig shows that the ras server dns is
correct. however if you ping our mail server it resolves to the outside dns
not internal. This only seems to happen when remote clients are getting a ip
address assigned remotely that is on our internal class. (ie client at remote
location using wireless gets ip address 192.168.0.40 and dns of that network
192.168.0.11 then clients establishes a vpn connection to our server and
recieves ip address for the vpn of 192.168.0.206 and dns server address
192.168.0.5) ipconfig /all shows all correctly but when client tries ping say
mail.myserver.com it is returning external dns ip instead of internal. Any
ideas would be greatly appreciated.
Thanks

 

[Guest]

Archived from groups: microsoft.public.win2000.dns (More info?)

hex2bin <hex2bin@discussions.microsoft.com> wrote:
> remote clients connect to vpn fine. Ipconfig shows that the ras
> server dns is correct. however if you ping our mail server it
> resolves to the outside dns not internal. This only seems to happen
> when remote clients are getting a ip address assigned remotely that
> is on our internal class. (ie client at remote location using
> wireless gets ip address 192.168.0.40 and dns of that network
> 192.168.0.11 then clients establishes a vpn connection to our server
> and recieves ip address for the vpn of 192.168.0.206 and dns server
> address 192.168.0.5) ipconfig /all shows all correctly but when
> client tries ping say mail.myserver.com it is returning external dns
> ip instead of internal. Any ideas would be greatly appreciated.
> Thanks

The record is still in cache, or you client is still using the wrong DNS.
How do you connect to the VPN? Through another LAN connection or through a
dial up?


--
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
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[Guest]

Archived from groups: microsoft.public.win2000.dns (More info?)

when this issue happens. The client is often using a remote wireless high
speed connection like at a hotel. If the hotel is assigning say 192.168.0.x
class ip then clients have the problem. If the hotel gives like a 10.16.x.x
then no problem. Only when the remote client gets a ip address that is on the
same class as our internal network 192.168.1.x 192.168.0.x if the remote
client gets a ip address of 192.168.8.x which we dont internally use the 8.x
class all works fine. but if they get an ip address that equals the same
class as our internal network the problem arises.
Thanks much


"Kevin D. Goodknecht Sr. [MVP]" wrote:

> hex2bin <hex2bin@discussions.microsoft.com> wrote:
> > remote clients connect to vpn fine. Ipconfig shows that the ras
> > server dns is correct. however if you ping our mail server it
> > resolves to the outside dns not internal. This only seems to happen
> > when remote clients are getting a ip address assigned remotely that
> > is on our internal class. (ie client at remote location using
> > wireless gets ip address 192.168.0.40 and dns of that network
> > 192.168.0.11 then clients establishes a vpn connection to our server
> > and recieves ip address for the vpn of 192.168.0.206 and dns server
> > address 192.168.0.5) ipconfig /all shows all correctly but when
> > client tries ping say mail.myserver.com it is returning external dns
> > ip instead of internal. Any ideas would be greatly appreciated.
> > Thanks
>
> The record is still in cache, or you client is still using the wrong DNS.
> How do you connect to the VPN? Through another LAN connection or through a
> dial up?
>
>
> --
> Best regards,
> Kevin D4 Dad Goodknecht Sr. [MVP]
> Hope This Helps
> ===================================
> When responding to posts, please "Reply to Group"
> via your newsreader so that others may learn and
> benefit from your issue, to respond directly to
> me remove the nospam. from my email address.
> ===================================
> http://www.lonestaramerica.com/
> ===================================
> Use Outlook Express?... Get OE_Quotefix:
> It will strip signature out and more
> http://home.in.tum.de/~jain/software/oe-quotefix/
> ===================================
> Keep a back up of your OE settings and folders
> with OEBackup:
> http://www.oehelp.com/OEBackup/Default.aspx
> ===================================
>
>
>

 

[Guest]

Archived from groups: microsoft.public.win2000.dns (More info?)

In news:57158B36-6913-4580-B3AC-0FD730B8DD5E@microsoft.com,
hex2bin <hex2bin@discussions.microsoft.com> made this post, which I then
commented about below:
> when this issue happens. The client is often using a remote wireless
> high speed connection like at a hotel. If the hotel is assigning say
> 192.168.0.x class ip then clients have the problem. If the hotel
> gives like a 10.16.x.x then no problem. Only when the remote client
> gets a ip address that is on the same class as our internal network
> 192.168.1.x 192.168.0.x if the remote client gets a ip address of
> 192.168.8.x which we dont internally use the 8.x class all works
> fine. but if they get an ip address that equals the same class as our
> internal network the problem arises.
> Thanks much

This is a common issue. You will have to change your company's internal IP
range to something other than 192.168.0.0/24 or 192.168.1.0/24.

Many routers that users purchase for home use come with either one of them
configured as default and companies with these ranges come across this
problem often. If your internal infrastructure is using one of those ranges,
expect problems.

Sorry to be the bearer of bad news.

--
Regards,
Ace

If this post is viewed at a non-Microsoft community website, and you were to
respond to it through that community's website, I may not see your reply.
Therefore, please direct all replies ONLY to the Microsoft public newsgroup
this thread originated in so all can benefit.

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft Windows MVP - Windows Server - Directory Services
Infinite Diversities in Infinite Combinations.
=================================