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VPN with overlapping IP addresses

 
 
kuehwi@inode.at
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      05-30-2005
Hi!

Since we are not very familiar with Cisco's VPN functionality, we have
the following problem on a PIX 506 (PIX Version 6.2(2))

Company A + B both want to establish a VPN to Company C.

A has the same subnet as B: 192.168.0.0 /24, C has a different one.

A established VPN to C with 192.168.0.0 - works fine, nothing to do.
C told B to use 192.168.2.0 for VPN and to do NAT to avoid conflicts.

I don't know how to realize this on the PIX at B's side (changing the
whole internal subnet of B is not possible!)

Would something like this help:

static (outside, inside) 192.168.2.0 192.168.0.0 netmask 255.255.255.0
dns

May this be right for the access-list?

access-list 100 permit ip 192.168.0.0 255.255.255.0 company_c_net
nat 0 access-list 100

Thanks for your help!

Robert

 
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