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Help...need to replace router in front of a Sonic Wall

Posted on 2008-10-30
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Last Modified: 2012-05-05
Hi all,
This week my main BT router failed. This was a managed service at one time and i can't find any documentation about its configuration. The problem i have is that it sits between BT and a Sonic Wall firewall. The sonic has been configured with two internal networks (LAN and DMZ) ports being utilized.
I have just recieced a replacement router from BT, but its unconfigured and a completely different model.

I tried to re-configure the new router and could not get my network backonline, so i was wondering if you guys could give me some advice and how to re-configure the new router.

Some documentation i have is listed below

I have a non NAT service and the range assigned to me is:

217.37.143.40 to 217.37.143.48

Firewall External Ethernet address 217.37.143.41
Firewall Internal Ethernet address 10.20.128.1
Firewall Internal Ethernet address 10.20.130.1
Firewall NAT entries 0

I also have been using windows VPN (pptp) to the following address for server1 and server2
Server 1 VPN dial address 217.37.143.44 (internal network 10.20.128.1)
Server 2 VPN dial address 217.37.143.43 (internal network 10.20.130.1)

The Sonicwall WAN interface show this configuration:
217.37.143.41
255.255.255.248
217.37.143.46 (default gateway)

So i plugged in my new BT wireless HUB unit and went to set up the internet connection and just can't get it to work. I know the internet connection is good because if i use DHCP to get an address i do. Trouble is i need to set this with manual addreses the way the old router was in order to get things up and running again.

Would really appreciate any advice on this one..


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Question by:dlloyd37
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by:therockyb
therockyb earned 50 total points
ID: 22847361
Hi,

I am not sure at all because I miss some info but lets try this...

When you receive your configuration on the BT with DHCP take note of the default gateway.

Then configure manually the configuration

IP: 217.37.143.46
mask : 255.255.255.248
gateway (the same from the DHCP)


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Author Comment

by:dlloyd37
ID: 23211754
Hi Thanks for you comment,
I must be just rubbish at routing...i seem to understand the theory. I just want
to understand how to put a router such as a zyxel in front of a sonic will.
I notice my zyxel has an option to use bridged mode...i'll give this a try and see what
i get.
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Accepted Solution

by:
dlloyd37 earned 0 total points
ID: 24355343
Okies, i think i realise what i need to do. I received a router from BT and rang them. They informed me to add the sonic will to its DMZ which now allows traffic to pass to the sonic. However, i can no longer use VPN services as the bt router will not pass that apparently, which sucks.

I will have to buy a new router which i hope to just setup as a pass through router, that's what i really need to do...
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