SonicWall TZ400 — End-of-Life & EOSL Dates
SonicWall TZ400 next-generation firewall. Last-order-day (end-of-sale) and end-of-support (EOSL) dates as published by SonicWall in its own Product Life Cycle Tables, linked for verification.
Every tracked SonicWall TZ400 SKU group is past SonicWall end of service life (last group Aug 2026). 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 2021 – Apr 2022
Last date of support
Aug 2026
Part numbers
2
2
months past last support
Why this score
- Past end of service life — 2 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
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 |
|---|---|---|---|---|
| TZ400 | SonicWall TZ400 next-generation firewall | Apr 2022 | Aug 2026 | Past support |
| TZ400W | SonicWall TZ400W next-generation firewall | Jul 2021 | Aug 2026 | Past support |
Options from here
The SonicWall TZ400 is past SonicWall 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.
SonicWall TZ400 — questions
Is the SonicWall TZ400 end of life?
Yes. Every tracked TZ400 SKU group is past its last date of support.
What is the last date of support for the TZ400?
Aug 2026, per the SonicWall end-of-sale bulletin.
Where do these TZ400 dates come from?
Every end-of-sale and end-of-service-life date on this page links to the official SonicWall end-of-sale bulletin it was taken from.
On the same timetable
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