[SunHELP] User Level Security

[vijayan gangadharan]

Hi,

 We would like to implement few basic  user level
security based upon the passwords.

We want to know that, whether it is possible to
implement an additional security with respect to User
access to the system other than traditional level of 
security at user level - which checks basic login
identification, authentication(password checking) and
file permission's.

 Is it possible to implement the following :

 1. Lock the login/user after n successful tries for
password
 2 User cannot user same password for next n changes
 3  Specific user defined words cannot accept as
password(ex:abc123,xyz456
etc)

apart from the normal requirement :
 
a)  Minimum Password length
b)  Maximum Password length
c)  Time duration before a password can be used again
d)  System should prompt the user to change his OS
password after  x number
of days, after x number days user not changed his
password system should
expiry the password.
e) Null passwords cannot be accepted


If the users account gets locked/forgets his password
(normal user not the root or the admin ), is there any
way we unlock the account without directly accessing 
the password or shadow file 

 Thanks & regards,
 Vijayan.G


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