Re: A different VPN/DHCP/DNS routing issue

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From: Mike Busch (mbusch_at_remove.wisor.com)
Date: 07/30/04 

Date: Fri, 30 Jul 2004 06:55:00 -0700

Ok you mention the LAN interface under RRAS. I see three
things under RRAS that look like they would be what you
are talking about;

Venus->Network Interfaces->Local Area Connection
and
Venus->IP Routing->General->Local Area Connection
and
Venus->IP Routing->IGMP->Local Area Connection

However the most likely candidate(Venus->Network
Interfaces->Local Area Connection) does not give me
access to properties and infact just about everything is
greyed out so there's not much for me to configure
there. My guess is I have to disable RRAS to edit this
field. Is this true? Is this where the incorrect DNS
info is?

Thanks,
Mike

>-----Original Message-----
> VPN clients do not get this info from DHCP. The
name server address
>(DNS and/or WINS), like the IP address, is part of the
PPTP negotiation at
>connection time. It comes directly from the RRAS server
itself. Usually it
>will give the client the DNS address which is configured
on the RRAS
>server's LAN interface.
>
> After the client connects it can get the DNS info
configured in DHCP by
>using a dhcpinform request. For this to work, the RRAS
server needs to have
>the DHCP relay agent configured.
>
>"Mike Busch" <mbusch@remove.wisor.com> wrote in message
>news:6d5601c475a4$d3ee1b60$a501280a@phx.gbl...
>> I know I asked a similar questions about VPN routing
>> earlier today and I really appreciate the answers i
got.
>> I'll report back if that work when the specific user
who
>> had the problem lets me know. but know I have a couple
>> of users with the same issue. My ew VPN server is
>> dishing out incorrect DNS information. My DHCP should
>> dish out the following DNS info:
>>
>> Primary: 192.168.2.60
>> Secondary: 192.168.2.62
>> Tertiary: 216.181.1.2
>>
>> The tertiary is our ISP's DNS server. the other two
are
>> local. My users can ping any IP address but they can
>> resolve names. If you Ip config all you'll get the
>> following:
>>
>> IP: 192.168.2.198 (this is within the DHCP scope so
>> that's good)
>> Subnet: 255.255.255.0
>> DNS: 216.181.1.2
>>
>> Obviously my ISP is not going to know that "Jupiter" is
>> 192.168.2.50. Why is my tertiary DNS server being used
>> as not just the primary, but the only DNS server?
>>
>> I tried to go into the VPN Client, leave IP as DHCP and
>> manually configure the DNS settings. After that when
you
>> ipconfig you get the DNS as follows:
>>
>> 216.181.1.2
>> 192.168.2.62
>> 192.168.2.60
>>
>> It's really wacky and all backwards! Pings still work
>> the same.
>>
>> For whatever reason he can resolve the name of one
>> machine that he uses quite often. I'm guessing there
is
>> some local host file that resolves that servername for
>> him.
>>
>> Totally confused. Any advice would be appreciated.
>>
>> Mike
>
>
>.
>

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