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[unix security] Re: Is anyone actually USING IP QoS?
> >Unix machine... drop all services you don't need, run your services not > >as the root, install secure level or read-onl.y file system - and no > >problems. > > this is just rediculous. it's not as simple as "no problems". the things > you state are rather obvious but for a system to be used as *anything* > (cache, web server, video server, etc) you simply have to have certain > ports open, many times simple udp ports. locking down down services/ports, > and running anything you can as non-root certainly goes a long way in > protecting the system but it's just not that cut and dried. The services is not the problem - use overflow-protected function stack (this exist now), use security-level to prevent any unaucthorised changes out of maintanance windows (exists now), and use the systems allowed to run non-root processes for the outer services (no www, no dns, no caching need high privileges; mail relaying don't need it too, pop or stream service don't need it too, etc). On the other hand, it's the open system - I can be sure the program stack is really overflow-protected (this means - you can't make wrong things even if you can overflow the stack), the file systems are really protected from the changes, the services really have not extra privileges. Non-open systems have some benefits for the first time because hacker's can't investigate the source codes, but then, a few years later, it appeared to have a huge problems. It's amazing to read about worms, mail viruses, etc working in the Unix environment, btw (through I can't blame mr. Gates for it). > > i'll give you and vadim full credit for being math wizards, or scientists > (which i clearly am not) but don't choose your next career in the > computer/network security industry. :) I can't speak about Vadim, but the security industry have often very strange approach to the security itself. They close the unexisting holes, but often keep open a very dangerous ways to intrude. And then, do you know the better firewall in the world? It's the scissors.