Re: repost: routing and remote access - why no dhcp options

From: Gary Roach (jgroach_at_NOSPAMcogeco.ca)
Date: 10/10/04 

Date: Sun, 10 Oct 2004 08:37:11 -0400

okay thanks - i found an article there from bill stewart titled "VPN clients
not receiving DHCP options".

"Bill Grant" <not.available@online> wrote in message
news:eg%233UvlrEHA.4004@TK2MSFTNGP10.phx.gbl...
> This has also been discussed in the ras_routing ng recently. See
>
> VPN clients not receiving DHCP options. Bill Stewart
>
> I don't have a setup like this to test, so I can't give you any direct
> feedback.
>
> "Gary Roach" <jgroach@NOSPAMcogeco.ca> wrote in message
> news:uNtPa8frEHA.736@tk2msftngp13.phx.gbl...
>> I'm reposting this because the thread seemed to go dead and i haven't
>> resolved the problem. basically the idea is that after establishing a PPP
>> connection between a client and an RRAS server, the client should be able
>> to see the dhcp server itself (instead of using PPP) so that it could get
>> additional options like DNS settings. when i establish a RAS connection,
>> i don't get these options and when i run ipconfig on the client, it shows
>> dhcp to be disabled on the PPP interface. here's the original thread:
>>
>> -----------------------------------------------------------------------------
>>
>> thanks for the advice. i looked at trying to get dhcp to update the ip
>> settings after ppp had connected but the interface appears to not support
>> dhcp directly (here is the relevant output from ipconfig/all:)
>>
>>
>> PPP adapter cervix:
>>
>> Connection-specific DNS Suffix . :
>> Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
>> Physical Address. . . . . . . . . : 00-53-45-00-00-00
>> Dhcp Enabled. . . . . . . . . . . : No
>> IP Address. . . . . . . . . . . . : 192.168.0.15
>> Subnet Mask . . . . . . . . . . . : 255.255.255.255
>> Default Gateway . . . . . . . . . : 192.168.0.15
>> DNS Servers . . . . . . . . . . . : 192.168.0.1
>>
>>
>> the client machine is running XP Pro. I also tried it with a demand dial
>> interface routing connection on another machine running server 2003. it
>> did
>> the same thing so i installed a relay agent on the original server 2003
>> machine on the Remote Router interface. i did this because the post that
>> you
>> referred me to mentioned using a dhcp relay agent. this had no effect. is
>> there a way to turn on dhcp on the PPP interface? thanks for the help.
>>
>>
>>
>> "Bill Grant" <not.available@online> wrote in message
>> news:eRL0lRNrEHA.1992@TK2MSFTNGP09.phx.gbl...
>>> PPP/PPTP hands out the name server addresses configured on the RRAS
>>> server when it gives the client its IP address. This is part of the PPP
>>> negotiation. The RRAS server leases a batch of IPs from DHCP for this
>>> purpose.
>>>
>>> After connection, the client can get settings directly from DHCP if
>>> it
>>> can find the DHCP server.
>>>
>>> You might like to look at a current discussion in the
>>> microsoft.public.w2000.ras_routing ng titled
>>>
>>> "DNS server order flipped beyond VPN" from Ghazan Haider
>>>
>>> "Gary Roach" <jgroach@NOSPAMcogeco.ca> wrote in message
>>> news:uoymI6MrEHA.1272@TK2MSFTNGP09.phx.gbl...
>>>> I'm using routing and remote access and clients get their ip addresses
>>>> using dhcp. this works fine but they don't get the DNS server address
>>>> as
>>>> specified in the dhcp options - they get the one associated with the
>>>> interface that's specified in the properties of the RRAS server. this
>>>> seems odd - is there a way to get the dhcp options to work with RRAS?
>>>> thanks for the help,
>>>>
>>>> gary
>>>>
>>>>
>>>> --
>>>> Gary Roach
>>>> ADB Services
>>>>
>>>>
>>>
>>>
>>
>>
>>
>
>

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