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uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed.

Non-NAT and Secondary IP config.

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Old November 9th 04, 11:34 PM posted to uk.telecom.broadband
Alex Bailey
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Posts: 1
Default Non-NAT and Secondary IP config.

I've done this several times with other kit (eg. BT Voyager 200,
LinkSys etc.) but I've got a real problem getting a BT Voyager 240 to
work. Here's the scenario:-

Our ISP has issued 8 IP addresses, and the router is setup for non-NAT
with another firewall device behind that. I believe I should set a
secondary IP address on the router to one of the fixed-IP range and
the primary IP address can be anything because in non-NAT mode it's
irrelevent. The router get's its WAN address (frame IP address)
automatically on ADSL login and I can ping that from outside the
network. However I cannot ping the secondary address nor any other
addresses on the fixed IP range.

The firewall behind the router is a VPN gateway and it seems to
connect to its VPN partner on another network ok but I cannot ping
from inside the network to an internal address on the other LAN.

I have done this fine with two BT Voyager 200 units and two LinkSys
firewall endpoints but just cannot get it working with a BT Voyager
240. I suspected routing table problems but don't fully understand

Any ideas, anybody? Can you confirm my use of the secondary IP address
is correct?


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