Firewall / Security Gateway Reference Design
An illustrative firewall / security gateway reference design for the aggregation / edge layer of the five-layer network architecture: 8 × Gigabit service copper ports (8-port PHY + discrete Gigabit transformers + 2×4 RJ45, with paired hardware Bypass relays keeping traffic flowing on power loss), 4 × 10G SFP+ optical ports, out-of-band MGMT and Console ports, 12V power, and the security processor core supplied by a multiphase VR with combined inductors. Each position is marked with the VOOHU parts available, recommended part numbers and package pinouts.
Illustrative PCB ⇄ Schematic
Illustrative top-side view arranged by functional zone (not the actual layout). Red numbered dots mark positions VOOHU can supply. Click a component on the board, an entry in the index below or a part in the schematic to see recommended parts and package pinouts on the right.
Illustrative service port topology: the security SoC connects to 8-port Gigabit PHY JL2388 (U2) over QSGMII; the PHY's MDI passes discrete Gigabit LAN transformers T1–T4 (WHSG48001TG, dual-port each) to bypass relays K1–K4 and then to the 2×4 RJ45 (J1). In normal operation the relays connect each transformer to its own port; on power loss, crash or timeout of watchdog U3 the relays release and short the cable sides of the two internal / external ports in a group directly together (hardware Bypass). The PHY-side center taps go to ground through 0.1µF, and the PHY's 25MHz crystal sits on XI / XO. Only 1 pair is drawn; the other 3 pairs and the remaining ports are identical; relay coil drive and flyback parts are indicated only, without detail.
Board bill of materials
Summarized by position; click any row to locate it on the board above.
| No. | Zone | Position | Ref. | VOOHU category | Recommended part | Availability |
|---|---|---|---|---|---|---|
| 01 | A Gigabit service ports · Bypass | Plain RJ45 2×4 (GE1–8 service ports) | J1 | RJ45 Connector | SYT59212488DB1A1DY1B022 | VOOHU |
| 02 | A Gigabit service ports · Bypass | Bypass relays ×4 | K1 K2 K3 K4 | — | — | Non-VOOHU |
| 03 | A Gigabit service ports · Bypass | Bypass watchdog / relay driver | U3 | — | — | Non-VOOHU |
| 04 | A Gigabit service ports · Bypass | Gigabit LAN transformers ×4 (dual-port) | T1 T2 T3 T4 | 10/100/1000 BASE-T | WHSG48001TG | VOOHU |
| 05 | A Gigabit service ports · Bypass | 8-port Gigabit PHY | U2 | Ethernet PHY | JL2388-PC | VOOHU |
| 06 | A Gigabit service ports · Bypass | 25MHz crystal | Y1 | — | — | Non-VOOHU |
| 07 | B 10G optical ports | SFP+ 2×2 integrated cage + connector | J2 | SFP+ Series | WHSFP15422D008 | VOOHU |
| 08 | B 10G optical ports | SFP+ power filter inductors ×4 | L1 L2 | Molded Inductors | WHYTA0420 series | VOOHU |
| 09 | D Security processor | Security processor SoC | U1 | — | — | Non-VOOHU |
| 10 | D Security processor | DDR memory | U4 | — | — | Non-VOOHU |
| 11 | D Security processor | SSD / eMMC | U5 | — | — | Non-VOOHU |
| 12 | D Security processor | TPM chip | U6 | — | — | Non-VOOHU |
| 13 | C Management | MGMT RJ45 with integrated magnetics (out-of-band management port) | J3 | RJ45 with Integrated Magnetics | SYT211Q066CD2A4D | VOOHU |
| 14 | C Management | Management port Gigabit PHY | U7 | Ethernet PHY | JL2101C-NC | VOOHU |
| 15 | C Management | Console RJ45 | J4 | RJ45 Connector | WH56A11810011101 | VOOHU |
| 16 | C Management | RS-232 level shifter | U8 | — | — | Non-VOOHU |
| 17 | E 12V power | 12V power input | J5 | — | — | Non-VOOHU |
| 18 | E 12V power | Input TVS | D1 | — | — | Non-VOOHU |
| 19 | E 12V power | Power-line common-mode choke (EMI) | L3 | Power Line Common Mode Chokes | WHACM12A65R701 | VOOHU |
| 20 | E 12V power | Synchronous buck ×2 | U9 U10 | — | — | Non-VOOHU |
| 21 | E 12V power | Molded inductors ×2 (DC-DC) | L4 L5 | Molded Inductors | WHYT0630 Series | VOOHU |
| 22 | E 12V power | Multiphase controller + DrMOS | U11 | — | — | Non-VOOHU |
| 23 | E 12V power | Combined inductors ×2 (multiphase VR) | L6 L7 | Combined Inductors | WHPBU-100705N-R10L0 | VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 23 positions. Opens directly in Excel.
Datasheet collection
Datasheet PDFs for the VOOHU parts recommended on this board.
Design files & footprint library
Schematic, PCB, and VOOHU part footprints and 3D models.
Coming soonRequest the firewall / security gateway reference design full package
Includes the full-board position list, datasheets for the recommended VOOHU parts and position-by-position selection notes. For selection advice on your service port count, number of Bypass groups, optical port speed or magnetics option (RJ45 with integrated magnetics / discrete transformers), describe them in your requirements. We reply within 24 hours on business days.
