There are 3 companies A,B and C. The WAN connection is thru ISDN BRI links(1841 routers).Traffic from A has to travel to B and C. When traffic enters form A to B lan source ip of packets should appear as it is. But when traffic is headed for C the source ip address of packets from A have to be hidden. ie depending upon the destination the source ip's have to be as it is or hidden. Is this possible?. Is outside nat the solutoin. Pls help!!
Routers for company A & C are not under my control.As such i have to implement this using B's (my company's) 1841 router using outside nat & route maps ie if it is possible.
A's src ip = 10.15.215.101
C's src ip as seen by A = 172.29.41.10
C's src ip as seen by B (my company) = 10.1.5.197
B's (my company) LAN ranges:- 10.10.9.X
ie 10.1.5.197 has been NATed to 172.29.41.10
The requirement is:-
When traffic from A (10.15.215.101) goes to 172.29.41.10 (C) its source ip ie 10.15.215.101 has to be changed to 10.50.12.X.(to appear as though it is sourced from our LAN)
But when traffic from A(10.15.215.101) goes to our LAN its source ip has to remain as such.(obvious)
I want to know if this is possible by configuring our 1841 router having IOS 12.3, without doing anything on other routers.The connection between the routers is by ISDN BRI.Please advice as to how this can be overcome !
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