27 hands-on ACL scenarios you build in your own Cisco Modeling Labs instance and grade against the answer key. ACL configuration and troubleshooting practice for CCNA and CCNP.
Three-router static-routing lab with two Linux endpoints. An extended IPv4 ACL is intentionally misordered inbound near the source, causing Telnet to be permitted unexpectedly. Learners must observe first-match behavior via hit counters, enable buffered logging to see ACL log entries, and then correct the ACL sequence so Telnet is blocked while SSH and ICMP are permitted. All routers include a complete SSH management plane. The final solution forwards end-to-end and is enterprise-clean.
Dual-router Branch/HQ lab with a branch client and an HQ server. You will apply an extended IPv4 ACL inbound near the source on the Branch LAN to block specific traffic (TCP/80) while permitting others (ICMP), and a standard IPv4 ACL outbound near the destination on the HQ LAN to admit only the approved source. Validate from real hosts, confirm ACL hitcounts, and keep inter-site connectivity via static routes over a /30 transit.
Deploy and verify multiple IPv4 ACLs on a single router that terminates three distinct LANs (Client, Server, and Management). You will place an extended ACL inbound on the Client interface to allow only specific services to the Server and block access to Management, a standard ACL outbound on the Management interface to enforce destination-side protection by source, and a VTY access-class to restrict router SSH to the Management subnet only. Validate with end-host tests that permitted flows succeed while denied flows are provably blocked, and use ACL hit counts and logs to troubleshoot.
CCNA70 min5 objectives
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