[pptp-server] Routing problem

Tony Skinner tlskinner at hendersontrucking.com
Wed Nov 10 09:21:02 CST 1999


At 02:46 PM 11/10/99 +0100, you wrote:
>Hello everybody,
>
>If i'm login with a vpn client it create a ppp device on linux,  and i see
network traffic on the ppp device.
>The problem is that there is no communication between the ppp devices. I
think a routing problem. How can i fix it ?

I see several problems with the setup you have listed here.

1. Your internal network is using a routable ip address scheme. You should
change this to 192.168.0.0 Class-C network space which has been defined as
private network addressing. If you require more addresses for your internal
network then you can use either the Class-A address scheme of 10.0.0.0 or
the Class-B scheme of 172.16.0.0 - 172.31.255.255.

2. Your PPP device is correctly using the 192.168.0.0 addressing scheme but
since your internal network is on a completely different *logical* network,
there is no information passing. As defined in the PoPToP HOWTO, the
'proxyarp' option only works if both the internal network and network
addressing of the PPP interface are the same. If they are different, you
must resort in creating a default route dynamically for each occurrence of
a new PPP session.

3. You failed to show the configuration of your /etc/ppp/options file so I
can't see how you have configured ppp to function.

I suggest you consult the HOWTO document for PoPToP. It will answer all
your questions.

Tony

>
>Here my network and some configuration files.
>
>internal network/ external network
>          1.1.1.0             /     62.108.6.0
>                  S E R V E R
>      1.1.1.2           /      62.108.6.143
>
>VPN
>ppp
>192.168.1.0
>
>----






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