Zone Based Firewall in IOS, combines 2 concepts: Modular Policy Framework and well-known Zones from ASA firewalls. ZBF solution is more secure than ACLs, easier to implement and to troubleshoot. Rely on statefull filtering what is also well-known from ASA firewalls. Despite this, is not fresh solution, but still works out very well.
By default Cisco router doesn’t provide any security regarding the access. You have to secure the router by yourself. In this article I’ll show how to do this for console and VTY lines .