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- Newsgroups: comp.sys.hp
- Path: sparky!uunet!sun-barr!ames!ncar!ico!spatial!alek
- From: alek@spatial.com (Alek O. Komarnitsky)
- Subject: Re: Sun Vs. HP system administration
- Message-ID: <1992Aug27.043211.29758@spatial.com>
- Keywords: YP
- Sender: usenet@spatial.com
- Organization: Spatial Technology, Inc. (Boulder, Colorado)
- References: <1992Aug26.052741.24845@spatial.com> <STEINAR.HAUG.92Aug26161118@delab.sintef.no> <37274@sdcc12.ucsd.edu>
- Date: Thu, 27 Aug 1992 04:32:11 GMT
- Lines: 35
-
- In article <37274@sdcc12.ucsd.edu> xm9@sdcc12.ucsd.edu (richard g. adair) writes:
- >In article <STEINAR.HAUG.92Aug26161118@delab.sintef.no> Steinar.Haug@delab.sintef.no (Steinar Haug) writes:
- >>Seems to work just fine, but there are security problems:
- >>
- >>programs) at their leisure. Sun's patch enables you to control which hosts
- >>(which IP addresses) are allowed to access your YP servers.
- >
- >Sun's own PC/NFS defeats this "security" with the ability of the PC
- >user to change his/her IP address at will. Any user can do this, so
- >think again about even such SUNisms as -root=machine in your mount
- >tables. False security is worse than no security...
- I suspect Steinar is well aware of this. Physical security is a really
- tough one, and there really is no easy solution today, although stuff
- like Kerboros may help down the road. As you pointed out, giving a
- knowledgeable user physical access to the network can be dangerous; why
- impersonate a host when you could just "sniff" for passwords, etc.
- I'll skip the dangers of physical access to machines, since this has been
- discussed a lot recently (IMHO, Sun seems to be a leg up here also).
-
- I think all Steiner was trying to point out is that Sun's YP implementation
- is a bit better - preventing "off-site" users from rebinding your ypbind (is
- this really possible - yuck!) and/or downloading your passwd file *is*
- desireable. I understand that NIS+ tightens things up a lot. NFS exports
- w/-root=machine is another (first level) attempt to slow down the bad guys.
-
- Bottom line: No system is entirely secure. But it's desireable IMHO to
- add some security rather than throw one's hands up because a perfect job
- is impossible.
-
- Alek Komarnitsky 303-449-0649
- Software Tools Manager, Spatial Technology, Inc. 2425 55th Street, Bldg A
- alek@spatial.com Boulder, CO 80301-5704
-
- P.S. I normally would send this via E-mail rather than post, but I hope
- others will take the last paragraph to heart.
-