Recovery via init=/bin/bash works. However, after reboot, some TMOS daemons fail because of timestamp mismatches on /etc/shadow and /config/bigip/auth.conf . Solution: boot into maintenance mode again, run tmsh load sys config default , then reload saved UCS.
Password reset is only half the battle — TMOS expects consistent auth state. 7. Comparison with Other Vendors | Vendor | Recovery Difficulty | |--------|----------------------| | F5 | Moderate (needs console) | | Cisco ASA/FTD | Easier (ROMMON password reset) | | Palo Alto | Harder (encrypted config, RMA-like process) | | Check Point | Similar to F5 (single-user mode via boot flags) | Final Verdict F5 password recovery is reliable but requires physical/console access. The process is well-documented by F5 (SOL23960, SOL12957), but admins often fail because they overlook master key encryption or TMOS integrity checks. Proactive UCS backups are the true safety net — password recovery should be a last resort, not a planned procedure. If you’d like, I can also provide step-by-step CLI commands for any of the recovery methods above. f5 password recovery