SIP access list to allow certain /32 addresses

Hi !

 

Can you please assist with the following. We have SBC's running 6.2.0 software load and I am trying to setup an access interface to only allow predefined IP addresses to access this SIP-Interface. There are no session agents configured in this scenario.

I've added an access list associated with a realm and defined one IP address only.

I am still able to register phones to that SIP-Interface from IP-addresses that doesn't match the ACL.

The access list is defined as

access-control

        realm-id                       access

        description

        source-address                 192.168.15.15:5062

        destination-address            0.0.0.0

        application-protocol           SIP

        transport-protocol             ALL

        access                         permit

        average-rate-limit             0

        trust-level                    high

        minimum-reserved-bandwidth     0

        invalid-signal-threshold       0

        maximum-signal-threshold       0

        untrusted-signal-threshold     0

        nat-trust-threshold            0