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Problems accesing external VPN - 22.May2008 9:50:38 PM

seinet

Posts: 1
Joined: 22.May2008
Status: offline

Hello all
I'm experiencing a problem that appeared before in the forums, but I have been reading and testing solutions for several days without success.

My configuration is like that:

[MyCustomerNetWork] - [MyCustomerVPN] - [internet] - [DSLROUTER] - [ISA-Server] - [MyPC]

I want to access my customer server with VNC via VPN connection.

- From my ISA Server
I have configured the vpn connection in [ISA-Server] to access [MyCustomerVPN].
Then I receive an IP address wich allows me to conect with [MyCustomerNetwork] machines using VNC.
Till here every thing is OK!

- From my [MyPC]
I have configured the vpn connection in [ISA-Server] to access [MyCustomerVPN].
Then I receive an IP address wich allows me to conect with [MyCustomerNetwork] using ssh.
But... when I try to connect using VNC it hangs, and there are several dropped pakets in the ISA server

ISA errors are like:
Client IP: [MyCustomerVPN]
Destination: [MyPC]
Action: Connection denied
Transport: GRE
Protocol: Not identified
Result Code: 0xc0040015 FWX_E_TCPIPDROP_PACKET_DROPPED
Status: The tcp/ip stack dropped a paquet

My ISA Server 2004 server has 2 network controlers.
This is curious that it happens when traffic is returning from [MyCustomerVPN] and works for some little things like ssh... but, when I generate a lot of output from ssh it hangs too.
Same thing happens with other customer when i try to acces via RDP with windows remote access client.
Some idea?