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Security Fundamentals Simulator
Standard ACL Simulator
Build a numbered or named standard ACL on R1. Send packets from PC-A/B/C to the server zone, watch them get permitted or denied. Implicit deny, shadow detection, and 6 exam scenarios baked in.
📡 Send Test Packet
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To
Speed
⚙️ ACL 10 — Rule Builder
📍 Standard ACL Placement Rule: Standard ACLs filter SOURCE IP only — they cannot see the destination. Always apply them as close to the destination as possible to avoid accidentally blocking traffic to other networks. This ACL is applied outbound on Gi0/1 (toward the server zone).
Remark
Action
Src IP
⚠️ Shadow detected: these rules can never be reached:
| Seq | Action | Source IP / Wildcard | Hits | Order |
|---|
Practice — ACL fundamentals & edge cases
Score: 0 / 0
Mixed questions about ACL syntax, placement, wildcards, and exam traps. Next button on right and wrong.
Question
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Drill this into reflex
Claim my free session →When a 'deny any' lands two rules too high
1:1 mentorship with real ACL debug scenarios, lab reviews, and US interview prep. Free first session. No card on file.