the older ilo4_273.bin file from the HPE Support Portal.
, avoiding "iLO watchdog reset" errors found in some transitional releases. HP Support Community 🛠️ How to Safely Downgrade downgrade ilo 4 firmware better
: iLO 4 versions earlier than v2.54 are vulnerable to critical security risks like CVE-2017-12542 , which allows for authentication bypass and remote code execution. the older ilo4_273
| iLO 4 Version | Pros | Cons | Best For | |---------------|------|------|-----------| | | Rock-stable, fan control perfect, .NET IRC works | No HTML5 console, older SSL ciphers (security scanning may flag) | Legacy environments, fan noise issues | | 2.62 | Stable, still allows IRC, fewer security warnings | Minor Java console bugs | General use without HTML5 need | | 2.65 | Good balance – introduces HTML5 beta | HTML5 console is slow | Mixed legacy/modern OS | | 2.70 | First version with improved ciphers, still supports IRC | Memory leak in long uptime | When security scans require newer TLS | | Avoid: 2.75, 2.77, 2.80+ | – | Broken IRC, fan bugs, license issues | No | | iLO 4 Version | Pros | Cons
Undeterred, John decided to try a different approach. He recalled that iLO 4 had a feature called " Firmware Update" which allowed him to update the firmware using a USB drive. He wondered if he could use this method to downgrade the firmware.
The most direct method is through the iLO web interface using a standard firmware image file.
Before we proceed, understand the wrong way to downgrade: