There are two basic ways to address this:

(a) Renumber one of the networks.  Unless they really *do* each 
contain thousands of systems, making them 10.0.0.0/16 and 10.1.0.0/16 
will do nicely.  (Beating up the people who assumed that their 
internal network would never have more than one segment is optional.)

(b) Insert a network device -- router or firewall -- that does NAT, 
in front of each of the networks, so that they can each be mapped to 
some non-conflicting range.  Note that NAT will need static rules to 
handle inbound traffic, so this may not be much less work than option 
(a)....

David Gillett


On 4 Jun 2001, at 1:47, dark dark wrote:

> hi all,
> what is I have to networks and I want to connect them
> with IPSEC. LAN-to-LAN I mean. 
> 
>   Network1--router-------------router--Network2
> (10.0.0.0/8)                         (10.0.0.0/8) 
> 
> so they are in the same IP segment. I am in network 1
> and I have 10.0.0.1 and I want to send packet to
> 10.0.0.2 (in network2) but there is 10.0.0.2 in my
> network too.(I mean in network1)
> any way to solve this problem. 
> thanks.
> 
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