I strongly think that two points are a main factor in choosing an OS with security in mind:
- first: knowledge of admins / powerusers
If you have no clue about *nix but are highly skilled in Win systems than choosing linux cause "it's more secure" is completly foolish and vice versa.
- second: function of the system
For instance, a few years ago I had a proxy-server/gateway/firewall running on a WinNT system, almost every 24 hours it crashed for some reason, mostly virus problems, DoS and other ****... I replaced that particular server with a linux box, almost the same functionality with half the hardware, and that little setup (once configured right) ran for months, even years without a crash.
It's all about use and perception...
for El-Half: about mainframes -> those things are stable and they evolved too, for instance look at the SYSTEM/390 (S/390) and Z series market... Although the market of those is declining, cause many entreprises are migrating to open platform environments. IBM is still going to offer support to at least march 2007.
S/390 and Z series mainframe-servers can be considered as the most reliable platforms around and you can run Linux on those big boxes! http://oss.software.ibm.com/linux390/index.shtml
About the advantages of linux on mainframe servers: http://www-1.ibm.com/servers/eserver...nux/about.html
