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Securing Debian HOWTO
Appendix A The hardening process step by step


A procedure is always useful, since it allows you to see the entire process of hardening the system and enables you to take decisions. A possible approach for such a procedure Debian 2.2 GNU/Linux is shown below. This is a post-installation procedure, for a checklist of measures to be taken, step by step, during configuration see Configuration checklist, Appendix B. Also, this procedure is (for the moment) more oriented towards hardening of network services.

For the truly paranoid, consider also the following:

FIXME: this procedure considers service hardening but not system hardening at the user level, include information regarding checking user permissions, setuid files and freezing changes in the system using the ext2 filesystem.


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Securing Debian HOWTO
v1.93 20 November 2001Tue, 13 Nov 2001 15:54:35 +0100
Javier Fernández-Sanguino Peña jfs@computer.org