MTU or ??? can see the shares but nothing else

[benkin]

I installed Wingate VPN 6.0.3 on my LAN (office side).
At home did the same installation. I can ping de server, see the shares, get the contents of a small directory, but nothing else.
I tried to modify the MTU but noting changed.
Following different documentations, I modified the MTU for the tunnel and the MTU for the ethernet card.
On both sides I use a router with ports mapping.
Is there somedy who knows what's going wrong?
What can I do?

Thanks for your help

[Pascal]

What did you modify the MTU to?

[benkin]

First I modified on both side in Ndiswan\parameters\protocols\0\ the ProtocolMTU with different values
Then I modified in TCPIP\Parameters\interfaces\ADAPTER\TunnelMTU

[genie]

What OSs do you have on the client and server machines?

[benkin]

On the server side Windows server 2003 SBE,
on the client side XP Pro

[genie]

Right. Then you have to modify MTU values for the adapters that are used in communications - say, you client is connected through a NIC: add MTU DWORD value in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{8BD22BDA-A5CA-4AD9-86B9-E237F3467A5B}

and set it to 1000 decimal - just for testing. Do the same thing on the server machine. You will need to reboot both machine.

However, before you do that, try something else. Start Advanced Options application in Wingate and untick all MSS-related checkboxes in the Protocol Handling branch. You will need to reboot the server machine after making these changes.

[Pascal]

First I modified on both side in Ndiswan\parameters\protocols\0\ the ProtocolMTU with different values
Then I modified in TCPIP\Parameters\interfaces\ADAPTER\TunnelMTU

Yes, but what value? This topic http://forums.qbik.com/viewtopic.php?t= ... hlight=mtu has posts detailing the recommended (Value used most often) along with a tool to make it a lot easier than manually editing the registry.

[benkin]

Ok it works, but it's still slow.
What can we change to make the system much faster.
Thanks for your help.

[Pascal]

Increase the MTU to around 1300 or 1330. Other than that, what type of Internet connection are you using?

[benkin]

My connection is at home ADSL (3.3 Mbps/192 Kbps)
and at office ADSL (3.3 Mbps/256 Kbps).

When a run a DOS application via the VPN it's very much slower then when I run the same application via PC Anywhere.

[Pascal]

There's a significant difference between running the application over the VPN and running it through PC Anywhere.

With PC Anywhere, you are connecting to the remote machine and running the application there. All that is travelling between the two computers are the 'screens' and 'user input'.

With VPN, it is a bit like a network cable - you are running the application and all communication it would normally have is going across the network. (Internet, in encrypted, secure form)

What is the current value for your MTU, and which set of changes did you follow?

[benkin]

The MTU is set to 1350. I just tested with 1300 and 1350.

[Pascal]

Once you have the MTU tweaked up as high as it can go; there's not much more you can do. VPN, by nature, is slower as *every* packet is encrypted. A fast computer helps; but on our tests performance on a 400 / 600mhz machine using dial-up was acceptable.

Without knowing what the application does it is difficult to say - or even how you are running it. (I.e. do you just run the copy on the remote server, or do you have a local copy that only accesses data from the server, etc.)

[benkin]

Thanks for your help.
I'll try to see how this application work.
and ... buy Wingate

Thank you very much