Firewall Rules

Overview

Design and test stateful and stateless policies, validate rule order, and reduce risk from shadowed or overly permissive rules.

Learning Outcomes

• Create inbound and outbound allow/deny rules
• Understand stateful vs stateless evaluation
• Detect rule shadowing and ordering issues
• Validate with test traffic (curl, nmap)
• Log, review, and change-control best practices

Hands-on Labs

Iteratively build rules, test flows, and analyze logs to refine policy safely.

Hardening

Principle of least privilege, default deny, and staged deployments.