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Sean Boudreau(deleted)
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Re: io-pkt / pppd: forwarding IP packets doesn't work
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Sean Boudreau(deleted)
10/23/2008 9:40 AM
post15446
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Re: io-pkt / pppd: forwarding IP packets doesn't work
On Thu, Oct 23, 2008 at 05:20:30AM -0400, Matthias Klein wrote:
> Our systems consist of two x86 machines (A and B). Both are
> connected to a 100 M/Bit LAN.
>
> An analog modem is connected to the serial port of the machine A. From our office (Windows XP) I dial into machine A
using PPP protocol. From my
> computer in the office I want to get access to the machine A and the machine B.
>
> The complete configuration is working on QNX 6.3.2.
>
> With QNX 6.4 M8 I can dial into the machine A and can access the machine A from my Windows machine using TELNET + FTP.
>
> But I can't access the machine B from the Windows machine.
>
>
> In the attachment is the startup script and the modem script.
>
>
> What must we change, to get IP forwaring working with io-pkt ?
Does you windows box have a route to machine B using machine A
as the gateway? Does machine B have a route back?
-seanb
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Weijie Zhang(deleted)
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RE: io-pkt / pppd: forwarding IP packets doesn't work
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Weijie Zhang(deleted)
10/23/2008 1:23 PM
post15460
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RE: io-pkt / pppd: forwarding IP packets doesn't work
First I guess the sysinit in your attached file is not what you are
using on machine A. There is no driver on command line or mounted onto
before the script calls waitfor enX.
The other parts of the scripts looks fine. I assume the machine A and
machine B are on the same LAN cable when you are saying the are on the
same LAN, i.e., they are not seeing each other through a router or
switch.
I think you may start to investigate by looking into tcpdump.
For example let us say the scenario is,
Your windows box (192.168.0.2) --ppp-- machine A (ppp=192.168.0.1 and
en0 192.168.1.1) ===LAN CABLE== machine B (192.168.1.2). That is,
machine A connects network 192.168.0.0/24 and 192.168.1.0/24.
On machine A, you may run tcpdump -i en0 to see if the packet with
src=192.168.0.2 (that is, from you windows box in your office) and
dst=192.168.1.2 is transimited through en0. If that is only what you
see, the problem is that somehow the machine B does not reply the
request. You may do further for investigation by doing tcpdump on
machine B also. And you may also try on machine B, route add 192.168.0.0
192.168.1.1. So, when the packet with src=192.168.0.2 and
dst=192.168.1.2 is received by machine B, it knows to send the reply to
192.168.1.1 as the first hop which is machine A.
Thanks
Weijie
-----Original Message-----
From: Matthias Klein [mailto:community-noreply@qnx.com]
Sent: October 23, 2008 5:21 AM
To: ionetmig-networking
Subject: io-pkt / pppd: forwarding IP packets doesn't work
Our systems consist of two x86 machines (A and B). Both are
connected to a 100 M/Bit LAN.
An analog modem is connected to the serial port of the machine A. From
our office (Windows XP) I dial into machine A using PPP protocol. From
my
computer in the office I want to get access to the machine A and the
machine B.
The complete configuration is working on QNX 6.3.2.
With QNX 6.4 M8 I can dial into the machine A and can access the machine
A from my Windows machine using TELNET + FTP.
But I can't access the machine B from the Windows machine.
In the attachment is the startup script and the modem script.
What must we change, to get IP forwaring working with io-pkt ?
_______________________________________________
io-net migration
http://community.qnx.com/sf/go/post15435
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