Fortinet FortiGate 400D — End-of-Life & EOSL Dates
Fortinet FortiGate 400D next-generation firewall. Published end-of-order (end-of-sale) and end-of-support (EOSL) dates from Fortinet's public hardware Product Life Cycle feed, linked for verification.
Every tracked Fortinet FortiGate 400D SKU group is past Fortinet end of service life (last group May 2023). Units in production should be treated as unsupported. For past-EOSL units, weigh third-party maintenance, spares, replacement, or a documented run-to-failure.
End of sale
May 2018
Last date of support
May 2023
Part numbers
3
39
months past last support
Why this score
- Past end of service life — 39 months ago
- Vendor-published date, source-linked
- Category: next-generation firewall
Support-lifecycle timing and source confidence only. Higher means more runway. It is not a risk, safety or compliance rating. How it is calculated
Part numbers in this family
All 3 share the dates above. Find your exact part to confirm.
| Part number | Description | End of sale | Last support | Status |
|---|---|---|---|---|
| FortiGate-400D | Fortinet FortiGate-400D next-generation firewall | May 2018 | May 2023 | Past support |
| FortiGate-400D-LENC | Fortinet FortiGate-400D-LENC next-generation firewall | May 2018 | May 2023 | Past support |
| FortiGate-400D-USG | Fortinet FortiGate-400D-USG next-generation firewall | May 2018 | May 2023 | Past support |
Options from here
The Fortinet FortiGate 400D is past Fortinet end of service life. These are the paths teams take from here:
Keep it in production past the OEM cutoff with an independent maintainer.
Buy spares now, while units still circulate on the secondary market.
It is unsupported today. Set a migration timeline and budget.
Low-criticality role: document the risk, harden backups, retire on your terms.
Independent and informational. EOSL.ai sells no hardware and no maintenance, and lists no paid placements. Third-party maintenance keeps unsupported gear in production past the OEM cutoff; whether it fits depends on the role the asset plays.
Fortinet FortiGate 400D — questions
Is the Fortinet FortiGate 400D end of life?
Yes. Every tracked FortiGate 400D SKU group is past its last date of support.
What is the last date of support for the FortiGate 400D?
May 2023, per the Fortinet end-of-sale bulletin.
Where do these FortiGate 400D dates come from?
Every end-of-sale and end-of-service-life date on this page links to the official Fortinet end-of-sale bulletin it was taken from.
On the same timetable
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