CCNA Foundations: Static NAT — One-to-One Inside/Outside Mapping

Today's daily lab

Deploy a single-edge router performing static one-to-one NAT so an inside host has a fixed public address. You will mark inside/outside interfaces, create the static NAT mapping, and verify reachability to an internet host and the translation table. The lab is intentionally small but enterprise-clean, with a routed inside transit, an access switch for the user LAN, and an external host representing the internet.

Learning objectives

• Identify and mark NAT inside and outside interfaces on an edge router
• Configure a one-to-one static NAT mapping for a specific inside host
• Verify NAT operation using translation tables and end-to-end tests from hosts
• Apply static routing to ensure return reachability for NATed flows

Troubleshooting focus

• Verify every link's interface status and IP addressing (`show ip interface brief`) and correct any interface that is down or misaddressed.
• Confirm each device's running configuration matches the lab objective, and bring any interface, route, or service that is not in its expected state back to health.
• Trace end-to-end reachability with ping/traceroute and isolate the first hop where forwarding fails.