We have two offices in the same building. We have a cable run between the two offices. Security policy dictates that we encrypt the data that passes between the two offices. We have a Cisco PIX 515E in Office A and a Cisco ASA 5505 in Office B. They are directly connected with a cat5 cable.... so they're on the same subnet.
I've been unable to get a tunnel working between the two devices - all of the encryption and key exchange settings and PFS settings match - and I've tried several different combinations of DES, 3DES, AES, etc. but it makes no difference. I'm seeing nothing on the PIX when I run 'debug crypto isakmp'.
I have IPSEC rules at each end that match all ip and icmp traffic from the relevant inside networks to the remote side's inside network and visa versa.
I used the wizards to build the config.
Is it a problem that they're on the same subnet?