Cisco HA Firewall Setup: Active/Standby Failover
This week at Null0 Labs, we configure a Cisco firewall pair in Active/Standby High Availability—because Cisco said so. We walk through the full HA setup, failover logic, and interface monitoring.
🔧 What’s covered:
• Active/Standby HA pairing
• Failover link and interface monitoring
• NAT and traffic continuity across failover
• Device priority
Whether you’re deploying in production or labbing for clarity, this walkthrough gives you a clean, testable HA foundation.
🛠️ Stuff I Use 🛠️
EVE-NG - multivendor network emulation software.
Linux, Ubuntu, Debian
OSX, Windows
Networking hardware - Multi vendor
👨🏻💻 About Me:
Hi I'm Matt a Senior Network Engineer with over two decades of hands-on experience architecting, securing, and optimizing high-availability networks across enterprise environments. I stream labs and create video content to help others level up their skills.
💻 Social:
Website: [null0labs.com](https://null0labs.com)
GitHub: [@null0labs](https://github.com/null0labs)
Instagram: [@null0labs]( / null0labs )
Twitter/X: [@null0labs]( / null0labs )
LinkedIn:[@mlewisonline]( / mlewisonline )
🙋🏻♂️ Questions or ideas? Drop them in the comments.
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