"LifeBoy" wrote:

> I have read a number of articles by now regarding routing and Windows
> XP.  I have enabled ip routing in the registry and also start routing &
> remote access services.  Here's my scenario:
>
> 1. A corporate network (of which I'm the admin) with static and DCHP
> clients
> 2. One specific machine used by a developer has two NIC's, NIC1
> connects to the network, the other connects via crossover cable to his
> notebook as below:
>
> notebook <----> [nic1 --- DEV MACHINE --- nic2] <-----> corporate
> network.
>
> The reason for this setup is that he does large transfers between his
> notebook and desktop via a gigabit link and the direct link does a
> great job.  But now he needs to access the rest of the network via this
> setup as well.  (No, we can't replace the OS with something else,
> basically we need to get XP routing going).
>
> The addresses are as follows:
>
> notebook: 192.168.110.2  def gateway: 192.168.110.1
>
> nic1: 192.168.110.1 no def gateway
>
> nic2: 192.168.100.60  def gateway: 192.168.100.1 (which is our firewall
> LAN port)
>
> I pressume that I should add some static routes, but where and how?  I
> understand that this is not that simple, since there is a route to be
> added to each machine on the LAN, right?  I can do that with policies
> (or possibly DHCP?), but exactly which routes and where.  I did a lot
> of this kind of stuff a few years back, so I have a basic understanding
> of routing, but the details now have me scratching my head.
>
> All help much appreciated.
>
>

"LifeBoy" <rolandgies***@gmail.com> wrote:
>I have read a number of articles by now regarding routing and Windows
>XP.  I have enabled ip routing in the registry and also start routing &
>remote access services.  Here's my scenario:
>
>1. A corporate network (of which I'm the admin) with static and DCHP
>clients
>2. One specific machine used by a developer has two NIC's, NIC1
>connects to the network, the other connects via crossover cable to his
>notebook as below:
>
>notebook <----> [nic1 --- DEV MACHINE --- nic2] <-----> corporate
>network.
>
>The reason for this setup is that he does large transfers between his
>notebook and desktop via a gigabit link and the direct link does a
>great job.  But now he needs to access the rest of the network via this
>setup as well.  (No, we can't replace the OS with something else,
>basically we need to get XP routing going).
>
>The addresses are as follows:
>
>notebook: 192.168.110.2  def gateway: 192.168.110.1
>
>nic1: 192.168.110.1 no def gateway
>
>nic2: 192.168.100.60  def gateway: 192.168.100.1 (which is our firewall
>LAN port)
>
>I pressume that I should add some static routes, but where and how?  I
>understand that this is not that simple, since there is a route to be
>added to each machine on the LAN, right?  I can do that with policies
>(or possibly DHCP?), but exactly which routes and where.  I did a lot
>of this kind of stuff a few years back, so I have a basic understanding
>of routing, but the details now have me scratching my head.
>
>All help much appreciated.

> If I understand your question:
>
> 1. The developer already has access to the rest of the network on DEV
> MACHINE via NIC2.
Correct

> 2. He now needs to access the rest of the network from the notebook
> computer.  You want to know how to do that by using DEV MACHINE as a
> router for the notebook computer.
Correct again.

> Here are two possible solutions that don't require creating routes or
> making any changes on the other LAN machines:
>
> =============================
> Solution 1
> =============================

"LifeBoy" <rolandgies***@gmail.com> wrote:
>Steve Winograd [MVP] wrote:
>> If I understand your question:
>>
>> 1. The developer already has access to the rest of the network on DEV
>> MACHINE via NIC2.
>Correct
>
>> 2. He now needs to access the rest of the network from the notebook
>> computer.  You want to know how to do that by using DEV MACHINE as a
>> router for the notebook computer.
>Correct again.
>
>> Here are two possible solutions that don't require creating routes or
>> making any changes on the other LAN machines:
>>
>> =============================
>> Solution 1
>> =============================
>He does use a wifi link to access the corporate network, however, I
>would like to learn how to do this by using XP as a router.  This is a
>scenario that I have often encountered and I would like to get a
>solution for more than just this specific case.
>
>> 1. Disable IP routing on DEV MACHINE.
>>
>> 2. Add a second NIC (USB or CardBus) to the notebook computer and
>> connect it to the corporate network.  It will get a 192.168.100.x
>> address for access to the rest of the network.
><snip>
>
>> =============================
>> Solution 2
>> =============================
>> 1. Disable IP routing on DEV MACHINE.
>>
>> 2. Enable Internet Connection Sharing on DEV MACHINE's NIC2
>> connection.  If it asks what to use for the home network connection,
>> tell it to use the high-speed link.
>
>This is a problem, since the corporate network policy enforced by the
>domain does not allow ICS to be turned on on the DEV machine or
>anywhere else for that matter.  Since DHCP is in use on the network, it
>would create chaos with clients not getting addresses from the correct
>DHCP server.
>
>So, although this may be a workaround in certain situations, it doesn't
>solve the problem on how to set up XP as a full network to network
>router.
>
>(BTW. I have seen numerous articles and posting that refer to the
>routing of subnets, when in fact the do not use subnets (ie they use
>netmasks like 255.255.255.0 which is not a subnet, but a full network)