[pptp-server] Routing & Ping-Problem

[max4eu.net Support]

Hallo,

I know, old thing, but new Problem:

I will use pptp to tunnel via a dyn-ISP-DialUP fixed IP´s to my customers
from my own Adresspool (For statistic-services, like mysql, etc.)...

My Problem is, booth sides are doesn´t routing. Only the tunnel-PC´s can
ping the pptp-Partner.

I made a lot of trys. with proxyarp, without proxyarp, with statitic-routes
(all variants). - no forwarding :-((

Generally:

ip_forward=1 and proxy_arp=1 are set on booth sides ! - No Firewall was
enabled in booth machines. I use Kernel 2.4.6p6 (same result with 2.2.19,
too)

My Situation:


VPN-Gate: 80.64.128.5

Destination-IP´s: 80.64.132.0 - 7 to customer.

Booth routes 80.64.128.0/24 and 80.64.132.0/24 are routed from the
border-gateway (Cisco) via FastEthernet to the whole network. (For reachable
from the world-internet-site...)

On the VPN-Machine after a pptp-tunnel was established a route was set
(80.64.132.0/29) to ppp0. included prox-arp.

I see with iptraf on the destination site, ICMP-Request for all 6 IP´s
(.2-.6) are goes through the tunnel, but would be never answered from an
fastethernet on the other side. Only when the packets comes from the vpngate
itself. I Asume, i have a problem with enable_Forwarding, but i don´t use
iptables or other things (not needed).

On the peer-site i setup a route 80.64.132.0/29 send too ppp0, the rest,
included the physical tunnel, goes via ippp0 (!) / ISDN to the dyn-provider.

The Problem exists on booth sides, No traffic outside the vpngate, no
traffic to the other machines on the lan from the dial-IN-Router.

I made trys with all ip´s on booth sides in the same subnet, in different
subnets, all times the sames problem, no routing :-((

Any Hints for me for my kernel 2.4.6 and my config ?

Regards,
Ernst