Fortinet FortiDNS 400C — End-of-Life & EOSL Dates
Fortinet FortiDNS 400C dns appliance. 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 FortiDNS 400C SKU group is past Fortinet end of service life (last group Jul 2022). 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
Jul 2015 – Jul 2017
Last date of support
Jul 2020 – Jul 2022
Part numbers
2
73
months past last support
Why this score
- Past end of service life — 73 months ago
- Vendor-published date, source-linked
- Category: dns appliance
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
Dates vary across 2 groups in this family, so every row carries its own. Find your exact part before you plan.
| Part number | Description | End of sale | Last support | Status |
|---|---|---|---|---|
| FortiDNS-400C | Fortinet FortiDNS-400C dns appliance | Jul 2015 | Jul 2020 | Past support |
| FortiDNS-400C-G | Fortinet FortiDNS-400C-G dns appliance | Jul 2017 | Jul 2022 | Past support |
Options from here
The Fortinet FortiDNS 400C 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 FortiDNS 400C — questions
Is the Fortinet FortiDNS 400C end of life?
Yes. Every tracked FortiDNS 400C SKU group is past its last date of support.
What is the last date of support for the FortiDNS 400C?
Last dates of support across FortiDNS 400C SKU groups range from Jul 2020 to Jul 2022.
Where do these FortiDNS 400C 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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