Firewall Rule Design
Designing Secure Firewall Rules
Secure your network infrastructure by implementing effective and precise firewall rules.
Why Secure Your Network
Firewall rules protect your network infrastructure. A properly configured firewall ensures only authorized traffic is allowed and reduces the exposure of critical systems and services.
Firewall Concepts
Inbound Rules: Rules that control what traffic is allowed into your infrastructure.
Inbound vs. Outbound Traffic:
Control traffic from the outside-in, and internal-external. Default Deny:- Deny All, Allow Specific
- Allow Specific, Deny by Default
Best Practice:
- Limit allowed ports: only allow required
- Use deny rules for known-bad actors
Firewall Rule Design Exercise
- Implement an IP allow list
- Create deny rules for IP black-list
- Enable logging of denied traffic
Choose one task for practice. Use the form below to practice writing firewall rules for secure configurations. Start Simulation
Example: Allow HTTP/S, SSH, and RDP
Allow tcp any any eq 80,443
Allow tcp any eq 22