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Article View: comp.sys.next.misc
Article #3207

Re: Password file

#3207
From: David Lemson
Date: Sat, 07 Nov 1992 06:14
32 lines
1979 bytes
jeffo@uiuc.edu (J.B. Nicholson-Owens) writes:

>Douglas Floyd writes
>> Is the NeXT Password file shadowed, or can anybody who logs on/ftps/
>> telnets onto your system obtain the password file so they can
>> run crack on it and find more ways to break in?

>The NeXT password file is not shadowed accessible without even having an  
>account on the system.  You can do remote nidumps of someone else's password  
>file.  Unfortunately making one's password information secure seems to be hard  
>(if not impossible) without changing a MAJOR portion of the operating system  
>(or at least this is what I was told by people on comp.sys.next.* when I asked  
>a similar question).

Not exactly right.  If you set the trusted_networks property in your
root level of netinfo (or whatever level you want to protect), you
can allow queries to only come from specific subnets.  That is
pretty good security, I think. (at least from outside people)

However, Netinfo does not provide shadowing, and anyone who has a
user account can get a copy of the password file and running nidump
or a getpwent() call (if you have disabled nidump!)

>Secure passwords that crack cannot decipher seem to be the best protection  
>against one's net-connected NeXT being broken into.

Always true.
-- 
David Lemson                                                (217) 244-1205
University of Illinois NeXT Campus Consultant / CCSO NeXT Lab System Admin
Internet : lemson@uiuc.edu                UUCP :...!uiucuxc!uiucux1!lemson 
NeXTMail accepted                                  BITNET : LEMSON@UIUCVMD
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Newsgroups: comp.sys.next.misc
Path: arc1-ca.pugleaf.net!sparky!uunet!caen!uwm.edu!ux1.cso.uiuc.edu!lemson
From: lemson@ux1.cso.uiuc.edu (David Lemson)
Subject: Re: Password file
Message-ID: <BxC1Bz.19v@ux1.cso.uiuc.edu>
Organization: University of Illinois at Urbana
References: <83164@ut-emx.uucp> <BxBIwK.97H@news.cso.uiuc.edu>
Date: Sat, 7 Nov 1992 06:14:08 GMT
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