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Office Segmentation & Firewall Hardening

Problem

Single LAN /24 causing broadcast flooding and unrestricted access between departments.

Action

Implemented VLAN segmentation (VLAN10 Admin, VLAN20 Finance, VLAN30 Guests), configured firewall rules, disabled WAN admin access, enabled QoS and syslog monitoring.

Result

Inter-VLAN latency <3 ms, no cross-traffic, firewall CPU <40%, security and bandwidth efficiency up ~25%.