@netlab.academy: 🚨 This ONE line of config just blocked a "unauthorized user" from my server Built a 3-VLAN network in Cisco Packet Tracer: 🖥️ Server on its own VLAN ✅ Authorized PC — full access 🚫 Unauthorized PC — blocked Used router-on-a-stick to let all VLANs talk to each other, then dropped in a single Access Control List to cut off just the unauthorized device. Result? Authorized PC pings through. Unauthorized PC gets nothing. 🔒 This is exactly how real companies segment their networks to keep sensitive systems locked down. Can you spot where I applied the ACL to make sure it couldn't be bypassed? Drop your answer below 👇 #acl #networking #ciscopackettracer #cisconetworkingacademy #networksecurity

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Thursday 10 September 2026 13:08:42 GMT