USA pharma plant firewall sizing: Fortinet checklist for OT segmentation (2026)

Firewall sizing in plants is different from office IT: you have OT protocols, segmented zones, and strict uptime requirements. This guide helps you estimate the right Fortinet model and budget.

1) Define your zones and traffic

• IT zone, OT zone, DMZ, remote access zone

• Number of sites and inter-site links

• Peak throughput (Gbps) and concurrent sessions

2) Decide which security services you will enable

• IPS/IDS

• SSL inspection

• Web filtering

• Sandboxing

• SD-WAN

3) Sizing rules of thumb

• Size for worst-case: SSL inspection + IPS reduces effective throughput

• Plan headroom (30–50%) for growth and incident conditions

• Prefer HA pairs for critical plants

4) What drives pricing in India

• Hardware model + HA

• FortiGuard subscriptions (bundle vs à la carte)

• Support level and term (1/3/5 years)

• Implementation + ongoing monitoring

5) Procurement checklist

• Bill of materials (BOM) with licenses and support

• Network diagram + segmentation plan

• Acceptance tests: failover, logging, remote access

Next step

Share your plant topology (sites, bandwidth, zones, remote users) and we’ll recommend a right-sized Fortinet BOM with an India-appropriate budget range.

CTA: Request a security assessment

Related reading

Related: Purdue model firewall placement — /post/purdue-model-for-pharma-plants-zones-conduits-and-firewall-placement

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