Sonicwall GVC not wokring behind WRT120n NAT-router

[Jvancan]

Hello All,

I am trying to establish a VPN session with a Sonicwall SOHO3 Firewall at our main office.
The laptop I am trying to connect has the sonicwall Global VPN client for connecting and is located behind a Linksys WRT120n NAT-router.

I get to the fase that VPN session is trying to get an IP-address from the remote DHCP server. This fase never ends and I suspect it's a NAT problem. Also already found some info on that regarding Sonicwalls.

When I connect the laptop directly tot the Cable modem the VPN connection works. So i know it goes wrong in the Linksys.

I also tried to disable the SPI Firewall and all the VPN Pass-trough protocols are on enable.

What I was thinking to try next is putting the Laptop in dmz mode. Will this probably fix the problem? I can not test this a the moment because the laptop is at another location and I would like to know on forehand how much the chance for succes is.

Does DMZ also work when the laptop would be wirelessly connected to the Linksys?

I know the security implications of using DMZ, but all that matters is getting the VPN connection up an running.

 

[CntdwnToExtn]

What class network is your laptop on and what is the remote site on? A/B/C?
Make sure they are not on the same class.
Ex. 192.168.0.0 should not try to VPN to a 192.168.0.0 network.

Is there a way you can assign a "static" IP for the VPN connection in your software?
For my ShrewSoft VPN I "use a virtual adapter and assigned address"

My work is on a 172.16.0.0 network, so I've assigned a bank of 192.168.0.0 in my access control list on the router to allow access to the network 172.16.0.0. When the VPN software connects, it connects with the 192.168.0.0 adapter.