HP ProCurve 2600-PWR Series Manual page 32

Configuring Username and Password Security
Front-Panel Security
2-8
the switch vulnerable when it is located in an area where non-authorized
people have access to it. Passwords could easily be cleared by pressing the
Clear button. Someone who has physical access to the switch may be able to
erase the passwords (and possibly configure new passwords) and take control
of the switch.
As a result of increased security concerns, customers now have the ability to
stop someone from removing passwords by disabling the Clear and/or Reset
buttons on the front of the switch.