A network administrator is setting up a firewall to protect the organization’s network from external threats. Which of the following should the administrator consider first when configuring the firewall?
A.
Required ports, protocols, and services
B.
Inclusion of a deny all rule
C.
VPN access
D.
Outbound access originating from customer-facing servers
When configuring a firewall, the first step is identifying which ports, protocols, and services are required for normal business operations. This ensures only legitimate traffic is allowed. After establishing the required rules, a default deny rule is added for security.
B. Deny all rule is important, but it should come after defining required rules.
C. VPN access is a service to configure, but only after determining baseline needs.
D. Outbound traffic policies are part of refinement, not the first consideration.
References (CompTIA Network+ N10-009):
Domain: Network Security — Firewall configuration, rule order, least privilege.
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