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FreeBSD 安全入門( 二 )

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/usr/ports/security/snort – lightweight NIDS ex: http://www.subterrain.net/snort

Other tipstricks.
Use ntpdate to synch your clock with a time server such as clock.isc.org. crontab it to keep it reliable.
In /etc/ttys change the ‘secure" flag to ‘insecure" on each local TTY to prevent direct root login.
Enable sudo for restrictive root-level access.
Remember – turn off / remove what you don"t use – complexity does not compliment security.
Backporting sysctl stuff from –CURRENT to reduce the need for things like setgid kmem.

Links to related material.
This presentation: http://www.subterrain.net/
FreeBSD security advisories and info: http://www.freebsd.org/security
FreeBSD security how-to: http://people.freebsd.org/~jkb/howto.HTML

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