I am trying to create a VPN between a Cisco Pix and a Checkpoint firewall both in the same external subnet:-
PIX Outside 172.20.30.1/25
Checkpoint Outside 172.20.30.2/25
This fails with:-
crypto_isakmp_process_block:src:172.20.30.1, dest:172.20.30.2 spt:500 dpt:500
ISAKMP: phase 2 packet is a duplicate of a previous packet
I guess this is possible to do, as I am wanting to encrypt traffic from 2 directly connected customers as to protect both Environments.
Any help would be much appreciated.