VPN: all ok but problem with a single program

[clarissa1996]

Hi all,

I have configured a VPN (PPTPD) on a SuSE Linux.
My clients are Windows/XP.
All works perfectly !!

From the Internet I can connect to my private network and from my private network I can connect to the clients.

Here is the problem:
I have a client that need to run 3 applications. Theses applications connect to a server in my private network.
Two applications run ok. The third application return a connection problem.

On the firewall seems to be all ok (all is opened for this client).

Perhaps the problem is the VPN configuration.

Here is the file "options.ppp0":
lock
debug
auth
+chap
+chapms
+chapms-v2
mppe-40
mppe-128
mppe-stateless
name poseidon
proxyarp

I know that is it impossible to say where the problem is, but perhaps someone can point me to a possible solution or say me how to debug this problem.

Note: if this client is connected directly to the network, all 3 applications works correctly.

Best Regards. Clarissa