Re: [coLinux-devel] networking question

[Ian L. <Ian...@mq...>]

Ok, I think I see how this TAP interface works ... its equivalent to
a windows interface, a crossover cable, and a linux interface
all rolled into one.   It looks like windows (XP Pro) doesn't do 
forwarding by default - without Internet Connection sharing.

Funny thing is that Windows looks like it will only do connection
sharing such that the internal network interface is 192.168.0.1,
which is what my "external" network is on this host ;-)  Aint
gunna happen.  No matter.

With an external interface of 192.168.0.x/24 and an internal
interface (TAP) of 192.168.1.1/24 and a colinux interface of
192.168.1.2/24 I can ping from colinux to windows, and from
windows to colinux.  colinux times out going anywhere else
due to a suspected lack of forwarding in windows.  I still
get a "sendto" error if I try to ping the colinux interface address
from colinux.   But I'm still pretty happy with what I'm seeing.

Is it possible to configure the TAP interface to be on the same
network as the ethernet interface?  I didn't get very far doing
this (kepy coming up with duplicate IP errors, when there
wasn't another host using that address prior to TAP 
configuration).


----- Original Message -----
>From: "Dan Aloni" <da...@gm...>
>To: "Nigel Spowage" <Nig...@BT...>
>Subject:  Re: [coLinux-devel] networking question
>Date: Sun, 01 Feb 2004 07:35:20 +0200
>
> On Sat, Jan 31, 2004 at 11:29:54PM +0000, Nigel Spowage wrote:
> 
> > the colinux instance think's it's interface is up, and is 
> > configured the private ip of 192.168.0.40. pinging this ip 
> > causes ping to report:
> >   ping: sendto: Invalid argument
> >   ping: wrote 192.168.0.40 64 chars, ret=-1
> > 
> > have i missed a configuration step of the Tap-win32 driver ?
> 
> In Windows, if you configure an IP address for your TAP-Win32 
> driver it would fix this. 192.168.0.1 netmask 255.255.255.0.
> 
> Or optionally, if you enable Internet Connection Sharing this 
> subnet will automatically be used and you will able to access
> the Internet from within coLinux. (apt-get !).
> 
> -- 
> Dan Aloni
> da...@gm...
> 
> 
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--
Ian Latter
Internet and Networking Security Officer
Macquarie University

 Meet me at the Australian Unix and open systems
   User Group (AUUG) Security Symposium; 2004
  http://www.auug.org.au/events/2004/security/