It is easier to create appropriate ACL rules for server host firewalls than for border firewalls.

• A. True
• B. False
• C. Not Necessarily
• D. Unclear

Answer: (A)

The main idea is that scope and complexity matter for ACLs. A server host firewall protects a single machine, so you know exactly which services are running and which clients should be allowed to reach them. This lets you build a tight, precise allowlist for the specific ports and protocols those services need, and you can test and adjust it with that one host in mind. It’s easier to reason about because there are no dozens of other hosts, VLANs, NAT rules, or cross-subnet interactions to worry about on that device.

Border firewalls, by contrast, sit at the network edge and must cover traffic for many hosts across multiple networks, including internal users, partners, DMZs, and cloud resources. They must handle a wide range of services, dynamic IPs, VPNs, NAT, and complex routing, so the rule set grows large and intricate. The risk of unintended access increases as the policies must account for diverse pathways and changing environments, making effective ACLs harder to craft and maintain.

So, focusing ACLs on a server host is generally easier because the environment is smaller and more predictable, whereas border firewalls require managing a much broader, more complex policy.