Re: Win2k and CIPE

Jake Bullet wrote:

> On Tue, 2 Sep 2003, Phil Scarratt wrote:
<SNIP>
> 
> Win2k(Alice)           Linux(Bob)          Win2k(Chris)
> 172.16.0.2      172.16.0.1 - 172.16.1.1    172.16.1.2
> 
> I'd like the two client machines (alice & chris) to share a private
> network through the server (Bob) over CIPE.  The only way I could think of
> was to give each machine its own subnet and have Bob route between them.
> 
> I tried this for ages, but I could never get the Win2k clients to route
> the 172.16.0.0 network down the interface.  If I added specific routes
> then it sent the packets (from Alice to Bob) but then Bob failed to
> forward them.
> 
> Stephen
> 
With the following assumptions:
- CIPE tunnel between Alice and Bob with CIPE IP addresses 172.16.0.1/2
- Bob and Chris are on the same LAN with LAN IP addresses 172.16.1.1/2
- Bob is Chris' default gateway
Adding a route to Alice for the Bob-Chris LAN (route add 172.16.1.0 mask 
255.255.255.0 172.16.0.1) should allow packets to get from Alice to 
Chris and back.

If however, the following scenario presents itself:
- CIPE tunnel between Alice and Bob with IP addresses as marked above
- CIPE tunnel between Bob and Chris with IP addresses as marked above
then the following should work (never done this so totally untested):
- add route to Alice that points to 172.16.1.0 (route add 172.16.1.0 
mask 255.255.255.0 172.16.0.1)
- add route to Chris that points to 172.16.0.0 (route add 172.16.0.0 
mask 255.255.255.0 172.16.1.1)


Fil

-- 
Phil Scarratt
Draxsen Technologies
IT Contractor



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