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Handling a subnet conflict.
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Topic: Handling a subnet conflict. (Read 6495 times)
trymes
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Posts: 36
Handling a subnet conflict.
«
on:
Thursday 15 September 2011, 11:00:20 pm »
OK, so I have a subnet conflict. Renumbering one subnet or the other would make the most sense, but is not an option.
Setup:
Site1a has LAN 192.168.0.0/24 and a connection to Site2 via IPSec.
Site1b has LAN 10.3.0.0/16 and is connected to Site1a via ethernet at 192.168.0.43 (BLUE).
Site2 has LAN 10.3.0.0/16.
I have gotten around the subnet conflict between Site1b Site2 in the past using IPSec between Site1a and Site1b over the internet. I used a dummy subnet in the IPSec setup (10.33.0.0/16) for Site1b and configured a NAT rule at Site1b that mapped packets to/from 10.33.0.0/16 to/from 10.3.0.0/16. This worked quite well.
Now, I have replaced the Site1b router with Endian and replaced the IPSec tunnel with an ethernet connection that is assigned to BLUE with IP address 192.168.0.43. I have assigned a static route on Site1a's router that directs any traffic for 10.33.0.0/16 to 192.168.0.43, the BLUE interface for Site1b.
I thought that I should be able to use a destination or source NAT rule using the "Map Network" option, but I have not been able to make that work.
What am I missing here?
Tom
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