For 95% of users, the best version is (Released May 2022).
If your iLO 4 is already showing signs of NAND degradation, the intense write cycle of flashing a firmware—up or down—can cause the chip to fail permanently. Always perform an iLO diagnostic check before proceeding.
Downgrading iLO 4 to version 2.55 is often the better choice to restore the classic, fast, Java-based remote console, recover lost features, and keep your vintage Gen8 server running smoothly. Sometimes, to move forward, you have to look backward.
Certain newer firmware versions alter the thermal algorithms. If you use non-HPE third-party PCIe cards (like standard SSDs, 10GbE NICs, or GPUs), iLO can no longer read their thermal data. downgrade ilo 4 firmware better
| Feature | iLO 4 v2.50–2.73 | iLO 4 v2.78+ | | :--- | :--- | :--- | | Fan Speed Commands via SSH | ✅ Supported | ❌ Removed | | HTML5 Console Stability | ❌ Not present / unstable | ⚠️ Present but buggy | | Java .NET Console Access | ✅ Works (with older Java) | ❌ Often broken | | Non-HPE PCIe Card Fan Control | ✅ Patchable | ❌ Fans lock at max speed | | Security Patches (CVEs) | ❌ Missing | ✅ Latest fixes |
. Newer versions (v2.40+) adopted a new style with larger fonts and more scrolling. Hardware Compatibility:
For enterprise environments, use a USB key. Boot from the SPP and navigate to Maintenance → Firmware Update → Force Options to allow version downgrade. This method is safer but requires an active support contract. For 95% of users, the best version is (Released May 2022)
Here are the most commonly discussed iLO 4 versions and why you might consider them (or avoid them).
To understand why downgrading is superior, you must understand the timeline. iLO 4 reached its and End of Development in 2020. However, HP (now HPE) released a series of final updates until 2023.
Of course, downgrading is not without risks—older firmwares lack critical security fixes for CVEs like and CVE-2017-8992 . However, in isolated homelab environments or legacy production systems where physical security is controlled, the benefits of downgrading often outweigh the security concerns. Additionally, downgrading can help recover from a corrupted upgrade that left the iLO in an unstable state. Downgrading iLO 4 to version 2
When your iLO 4 interface takes 45 seconds to load a page, when your remote console drops every five minutes, or when you see the CPU usage pegged at 100% for no reason—don’t troubleshoot for hours. Don’t wait for HPE’s next "fix." Sometimes, the best version of iLO 4 firmware isn’t the newest—it’s the one that just works. And for thousands of users, that version is 2.70.
The obvious counterargument is security. Newer firmwares patch vulnerabilities. However, for many homelab users, test environments, or air-gapped production servers, the stability and performance gains of a downgrade far outweigh the theoretical risk of an unpatched exploit. If your iLO is not exposed to the public internet (and it never should be), running a stable, older firmware is a perfectly acceptable risk.