Re: IP Routing

From: Jeff Kelley [MS] (jeffkel_at_online.microsoft.com)
Date: 09/09/04 

Date: Wed, 8 Sep 2004 17:34:52 -0700

Using command line apps isn't the easiest way to use a PocketPC, a GUI based
app would be more convenient.

However, have you tried the PPC Command Shell that is part of the
(unsupported) WM Power Toys?
http://www.microsoft.com/downloads/details.aspx?FamilyID=74473fd6-1dcc-47aa-ab28-6a2b006edfe9&displaylang=en

You could then build the route.exe app from the sources that are released
with Platform Builder (public\common\oak\drivers\netsamp\route), and run it
from the command shell, I think. I haven't done this myself though. 

-- 
Jeff Kelley
Microsoft / Windows CE Networking
This posting is provided AS IS with no warranties, and confers no rights.
"Don Keller" <DonKeller@discussions.microsoft.com> wrote in message
news:147CF1CB-81B4-4C40-AABF-78B267BEDDBE@microsoft.com...
> Hi Jeff,
>
> I was wondering if you could direct me to how I access route.exe on PPC
2003.
>
> Thanks,
> Don
>
> "Don Keller" wrote:
>
> > Thank you.  That was very helpful and makes a lot of sense.
> >
> > One question though...how do I get to a command line on PPC 2003 to use
the
> > route.exe command?
> >
> > Thanks a lot for the support.
> >
> > Don
> >
> > "Jeff Kelley [MS]" wrote:
> >
> > > After the VPN connection is established, there should be a default
route
> > > added to the TCP/IP routing table. This default route will have a
> > > Destination=0.0.0.0 Netmask=0.0.0.0 Interface=<IP address of VPN
interface>
> > > and Metric=1. That default route metric should be lower than the
default
> > > route metrics for other interfaces in the system. As a result, packets
to a
> > > destination IP address that do not match any of the other routes in
the
> > > routing table will use the route of last resort (the default route)
with the
> > > lowest metric and thus get routed through the VPN interface.
> > >
> > > If the underlying network interface (the interface on top of which the
VPN
> > > connection is running) has a subnet route in the route table and
packets are
> > > sent to that subnet, then that subnet route will take precedence over
any
> > > default routes. There is an issue with CE 4.2 (on which WM2003 is
based) in
> > > that when it creates a RAS connection (e.g. modem) it always adds a
subnet
> > > route for that interface, even when the RASEO_RemoteDefaultGateway
flag is
> > > set for the connection and it is adding a default route for it. I
suspect
> > > that what is happening in your case is that you are creating a dialup
> > > connection which is adding the 10.0.0.0 subnet route, then the VPN
> > > connection is also assigned a subnet of 10.0.0.0. Packets being sent
to
> > > 10.x.x.x may thus be routed to the dialup connection rather than the
VPN.
> > >
> > > A fix for this problem was made so that RAS connections no longer add
a
> > > subnet route if they are becoming the default route (i.e. have the
> > > RASEO_RemoteDefaultGateway flag set). Thus in your case with the
initial
> > > modem connection no 10.0.0.0 subnet route would be added to the
routing
> > > table. The fix was released as a QFE to CE 4.2, and an AKU for WM2003,
but I
> > > don't have information on whether your particular OEM has released an
update
> > > for your device.
> > >
> > > The workaround is to add another route to the routing table after the
VPN
> > > interface is brought up. Using the command line "route.exe" command it
would
> > > look something like this:
> > >     Route ADD 10.0.0.0 MASK 255.0.0.0 <IP Address of VPN> METRIC 1 IF
> > > <Interface ID of VPN>
> > >
> > > The route command is just calling into the IP Helper APIs to modify
the
> > > routing table. So, a GUI based app on WM2003 could do what the command
line
> > > route.exe app is doing. I'm not aware of whether something like that
already
> > > exists.
> > >
> > > -- 
> > > Jeff Kelley
> > > Microsoft / Windows CE Networking
> > >
> > > This posting is provided AS IS with no warranties, and confers no
rights.
> > >
> > > "Don Keller" <Don Keller@discussions.microsoft.com> wrote in message
> > > news:2A6EF4B4-DFC3-4287-9105-004945088693@microsoft.com...
> > > > How do I go about getting into the IP routing table on my Pocket PC
2003?
> > > > Similar to the ROUTE command-line utility on Windows.  I haven't
gotten
> > > into
> > > > my comfort zone with PPC the way I am with other versions of
Windows.
> > > >
> > > > Basically, I am having a very difficult time with my VPN setup.  I
have an
> > > > Audiovox PPC4100 with Pocket PC 2003 on it with which I can
successfully
> > > > connect to a VPN server.  I installed a utility called PocketLan
that
> > > gives
> > > > me an ability to display my IP routing table, however, it doesn't
let me
> > > edit
> > > > it.  I can see that the routing table would cause some confusion
about how
> > > > packets are routed through the VPN vs. the default Internet
connection on
> > > the
> > > > device.  So I cannot connect to any of the hosts at work.  A tracert
> > > confirms
> > > > that the packets are sent through the Internet connection on the
device
> > > and
> > > > not the VPN connection.
> > > >
> > > > I have read every post I can find about the proper way to configure
the
> > > VPN
> > > > on it and nothing I have tried has made it work.  I think the issue
has to
> > > do
> > > > with both networks using similar IP addresses, 10.0.0.0, so I want
to make
> > > > more specific routing entries.
> > > >
> > > > Anyone know of a utility to edit these routes or another way I can
go
> > > about
> > > > it with a .NET app perhaps?
> > > >
> > > > Thanks,
> > > > Don
> > >
> > >
> > >

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