Permissions needed to run 'su'

[David C. Tuttle]

I administer a Sun 3/110 running 4.0.3 (still... :-) and have a small 
mystery on my hands. I think it's got a simple answer - I just don't know 
what it is.

Today, I found that I could not "su" to root from my no-special-privileges 
account (i.e., an account not in the "wheel" group).  My administrator 
account (in the "wheel" group) was not affected.  Now, I wonder what I (or 
someone else?) have done to cause this.  And more generally, what does one 
do to implement/deimplement this level of security (we have an Alliant 
that has never allowed what the Sun allowed routinely... until now).

The part of TFM where I expected to find the answer says nothing useful.  
I'd appreciate an e-mail from someone who knows what controls this.  
Thanks!

--
David C. Tuttle                           dct at mdaali.cancer.utexas.edu
Software Systems Specialist               Department of Biomathematics
University of Texas M.D. Anderson Cancer Center         Houston, Texas