Priority order. Each phase is usable on its own -- you don't need everything to start being more secure.
Buy: Cisco ASA 5506-X
This is the single highest-impact purchase. Right now your ISP router is your only defense and it's garbage. The ASA replaces it as your gateway and gives you:
You can run your entire network through the ASA alone using its built-in 8-port switch. No managed switch needed yet. Plug STARGATE, moirai, and your current AP directly into the ASA's LAN ports.
Even without VLANs, you immediately get a real firewall + IPS between you and the internet.
Search: "Cisco ASA 5506-X" on eBay, $40-80. Get one with FirePOWER license if possible (most have it). Comes with power supply. That's all you need.
Time to deploy: one afternoon.
Buy: Cisco SG350-10 or WS-C2960X-24PS-L
Now you add VLANs. This is what isolates family and IoT devices from your trusted network.
Plug it into the ASA's trunk port. Configure VLANs 1/20/30. Move your wired devices to the right access ports.
At this point family devices are still on your current AP with no segmentation -- but your wired infrastructure is segmented.
Time to deploy: one evening.
Buy: Cisco Aironet 2802i or 3802i
This completes the build. The Aironet replaces your consumer AP and broadcasts separate SSIDs per VLAN.
Now everything is segmented -- wired and wireless. Family gets internet-only access, IoT is fully jailed.
If your switch has PoE (2960X), the AP powers over ethernet. If not, grab a Cisco AIR-PWRINJ6 PoE injector for ~$10.
Time to deploy: one evening (firmware flash takes the longest).
| Priority | Item | Why | Price |
|---|---|---|---|
| 1 | Console cable (USB to RJ45) | Configure ASA/switch via CLI | $8 |
| 2 | APC SMT750 UPS (used) | Network stays up during power blips | $40-60 |
| 3 | Second Aironet AP | Coverage for dead zones | $25 |
| 4 | Dualcomm ETAP-2003 tap | Passive traffic mirror to STARGATE for Zeek | $40 |
| 5 | Second OptiPlex Micro | Dedicated IDS sensor (Security Onion) | $50 |
Phase 1: $40-80 ASA firewall = real perimeter defense TODAY
Phase 2: $30-50 managed switch = network segmentation
Phase 3: $25-50 enterprise AP = wireless segmentation
Phase 4: $40-180 hardening extras = monitoring, redundancy
--------------------------------------------------------------
Total: $135-360
Phase 1 alone puts you miles ahead of where you are now. Do that first, even if you can't buy anything else for a month.