I am trying to get 2 inside interfaces on a PIX 515E to talk to one another. (These networks need to have any-any type connectivity to each other)

I know on 7.X all you should have to do is create them with the same security level and do a:

same-security-traffic permit inter-interface

However, I am running 6.3 and cant upgrade due to memory to 7.X

Here is what I have

ETH0 Outside interface (nat pool) security level 0 (X.X.X.X - Outside/Internet)

ETH1 Inside interface security level 100 (192.168.5.0/24) (Inside space 1)

ETH1 Inside2 interface (VLAN3) security level 99 (192.168.6.0/23) (Inside space 2)

I can get the inside (192.168.5.X) to talk to inside2 (192.168.6.X) by doing a

access-list inside_outbound_nat0_acl permit ip 192.168.5.0 255.255.255.0 192.168.6.0 255.255.254.0

nat (inside) 0 access-list inside_outbound_nat0_acl

But I can't for the life of me get inside2 (192.168.6.X) to talk to inside (192.168.5.X)