I have a PIX 525 that has 8 interfaces, inside, outside, 2 security level 75 and 4 security level 50.
Traffic from interfaces on security level 50 must not be allowed to other security level 50 interfaces.
Traffic from interfaces on security level 75 interfaces is allowed to other security level 75 interfaces.
Therefore, I'd rather not enable the same-security-interface-permit command.
I've configured ACL's on the security level 75 interfaces to permit traffic to flow, but it doesn't appear to be working.
If I change the security level on one of the level 75 interfaces to 76, then traffic flows.
Any ideas ?