VPN Sometimes works sometimes not

[Gollen]

I've been strugling with the vpn for a week now. I'll try to tell the problem as exactly as i can.

I have two LANs they are very similar:
PC \
PC -Wingate PC (Using wingate for NAT and VPN too)
PC /

Let's call them LAN_A (this is my lan at home) and LAN_B.
LAN_A has a small limitation: Our provider said ports 1-1024 are disabled.
I don't really know if it is true or not, but i moved all service from this range.

Becouse the two LANs are so similar first time i choosed my home (LAN_A) server to host the VPN.

I followed the instructions found in the PDF file on the qbik support page. (there is one pdf about Wingate VPNs) I've also set the VPN port to 5555 no other software is using it. After i'd done everything, the lan didn't work. I was trying to change the Firewall settings, the vpn ports and so on. After each change i tried to connect. I did it until i succeeded! I was happy, but not for a long time, becouse after a disconnection (there was a net error) i couldn't reconncet. To be percise the connection was successful, BUT i couldn't ping the machines on LAN_B. I restarted the servers but it didn't work.

Next day i was able to connect, then i disconnected an reconnected and it still worked (i was able to ping, ususaly i didn't get connection error but i can't ping and transfer data on the VPN). After some time and a longer disconnect, i couldn't ping after reconnection.

When i had enough of it i transfered the host to the other LAN_B. Here i experienced more strange errors. The connection was always successful, BUT the ping... Sometimes neither lan was able to ping the other, sometimes LAN_B was able to ping LAN_A, but LAN_A was unable to ping LAN_B. But sometimes they were able to ping each other.

The servers always were able to ping each other using the LAN IP, these problems were experienced when a server or a computer tried to ping a computer behint the other NAT.

Whe i say ping, i mean the ping command and some other applications for example teamspeak, netop. Personal firewalls were turned off when i tried to ping.

So that's my problem. Anyone has idea? I hope i was clear.

Please help me if anyone has idet, thanx inforward,

[Pascal]

Few questions:

1. How do you have the client machines (Behind each primary VPN node) setup to connect to the VPN? Are you using RIP v2, static routes or are they using the VPN nodes as their default gateways?

2. Do you have different subnets on each end of the VPN? (E.g. 192.168.0.xxx and 192.168.1.xxx, etc.)

3. What version of WinGate / WinGate VPN are you using?

Oh. When the pings are impossible, can you try pinging it with decreasing packet sizes (As described in the MTU testing in that document)

[Gollen]

1) The clients are using the VPN node as they default gateway.

2) Yes, they are on different subnets 192.168.1.xxx and 192.168.2.xxx

3) I'm using wingate v5.0.8 and VPN 1.0.8 .

I've tried the limited packetsize ping too.

Oh, and sorry for posting my VPN problem in the Wingate Forum.

Thank you,

[Pascal]

I don't suppose we could convince you to upgrade, right? The driver has improved a lot since 5.0.8 and you can use your existing purchased license key with 6.0.2 and VPN 2.0.2.