03-25-2002 05:28 AM - edited 03-01-2019 09:01 PM
Hi all,
My problem is the following:
I have a network A using 10.0.0.0/8 addresses and
a network B, which also uses 10.0.0.0/8.
1. Readdressing is not possible, but connectivity must be provided.
2. Due to the large amount of possible IP addresses only dynamic NAT should be considered. Ideal would be to use NAT with host number preservation.
3. It must be possible to establish communication from both networks A to B and B to A.
4. The usage of a DNS server for forcing an outside NAT table entry (as described in the Tech Note "Using NAT in Overlapping Networks" is not posssible.
Question: Is there a way to accomplish the above stated task?
Thanks for comments in advance, Peter
03-25-2002 07:34 AM
Hi.
Can you be more specific and tell us what is the scenario? How many routers are involved and how?
NM
03-25-2002 10:32 AM
Hi Peter,
As Nuno indicated, we need to know a little more about your network (physical connectitvity between them, routers, f/w).
But, as you probably have incompatiblity about IP addressing between both network, for sure you need to NAT, both side. It's the easy part. After, to reach servers or hosts from any site, you should have translation as done by PIX f/w with static statement.
But we need more info to complete the job.
Regards
Benoit
03-25-2002 10:54 AM
Hi guys, thanks for your reply so far, although I'm already at home, I've created a small sketch to illustrate the problem. Please take a look at: http://home.snafu.de/pkostov/nat/nat.html
To summarize again:
Three things are important:
- All NAT should be done dynamically
- Communication should be established from both sides
- I have absolutely identic network addresses on both sides
Thanks in advance
Peter
03-27-2002 03:50 AM
Hi.
Unfortunately I don't see a solution for this case...
If you don't have DNS there's no way the router builds its NAT table appropriately.
The solution I thought doesn't work either. I thought you could do NAT on both routers (ip nat inside source...), but you say you can't. Even if you could it would only work after each host on either side tried to communicate at least one time with some other host beyond the router on each side.
Sorry.
Rgds.
NM
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide