Configure Security Policies on ASA transparent mode :
controlling IP traffic is configured in the same way as with a normal routed firewall using access-list and access-group commands with the advantage that non-IP trafffic (such as routing protocols, e.g. OSPF) can also be permitted/denied.
It is also possible to configure rules for which the ASA does not have inbuilt definitions by creating an EtherType rule.
In ASDM this done through:
And the CLI:
access-list <name> ethertype [permit | deny] <ethertype>
access-group <name> [in | out] interface <ifname>