same security level rules

[suthomas1]

Hi,

I came across some interface on our firewall with same security level & also ACE corresponding to each of these interfaces.

I also found that "same security level command" has been enabled on the firewall.

Question:

If 2 interfaces with same level say 50 need to pass traffic between each other, do they still require rules with above command enabled?

If i remove the rules and test the traffic , would it allow traffic between these interfaces based on above command?

Please suggest.Thanks.

[Patrick0711]

If the interfaces are configured with identical security levels, you have the "same-security-traffic permit inter-interface" command enabled, and you are running 7.2 or later code, you'll need to have specific rules to pass traffic in each direction between the segments.

[suthomas1]

that means even with this command, rules still have to be there.

Then what purpose does this command serve?

Thanks.

[Patrick0711 · Accepted solution]

Without the command enabled, traffic WILL NOT pass between two segments with identical security levels even if access-lists are configured.

With the command enabled, traffic WILL pass between the segments but must be permitted via an access-list.