Unfortunately I can't share any information on the router. It's company policy. But, if you could let me know where in the GUI interface of the router where I can find the ACL and how to enter the IPs to block I would really appreciate it.

Yes. I want to block any IP (i.e. 111.222.333.444 or the entire block 111.222.0.0) before they can reach the servers on the network.

Thanks for your response. Not sure how to apply to ACL and bind it. By the way, can I just use the Access Rules to block or deny each IP or blocks of IPs?MC