MAC ACL Firewall rules are not working in SEP 12.1.6

My company is using SEP's firewall as it's main source to block users from accessing our servers.

I'm using the attached firewall rules, but they're still not just allowing the Host's I specified to connect. I'm able to plug in a laptop not in the host list and access our servers.

I would like some assistance to know if what we're trying to do is possible, or if we need to find a different solution.

Thanks