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Securing Linux and UNIX variants
This
page is for the *nix newbie who doesn't know the basics of securing his/her box. The articles on this page are geared heavily towards linux (since it seems that linux is mostly what newbies to *nix first try). However, the basic principles of these articles can be applied to any *nix box. The author of these articles is Bryan Paxton who has worked on various security related linux projects.
This document covers:
- Password protecting the lilo prompt.
- Disabling crtl+alt+del shutdowns by any other user than root
- su, the safe way
- Disabling root login
The daemons this document covers are:
- Sendmail
- Bind
- NFS & Samba
- ATD
- PCMCIA
- DHCPD
- GPM
- INND
- GATED
- NIS
- SNMP
- APACHE
- FTPD
- Misc Services
This document covers:
- Tweaking your syslog.conf file to be more security concious.
This document covers:
- Securing /etc/passwd by using "shadow" passwords
- Password aging
Covers securing:
- gcc
- g++
- cc
- colorgcc
- w
- who
- finger
- ping
- telnet client
- shh client
- tracerout
This document covers setting permissions for:
- /bin/
- /boot/
- /dev/, /dev/audio, and /dev/dsp.
- /etc/ and several important files within.
- /home/
- /usr/ and directories within /usr/.
- /var/, /var/log/, and /var/spool/mail/.
This document explains:
- Prevention of remote hosts from gaining access to your box through IP spoofing.
This document covers the securing of:
- /etc/inetd.conf
- /etc/hosts.allow
- /etc/hosts.deny
This article explains:
- What PAM is
- PAM and DoS attacks
- What /etc/security/limits.conf is and some basics dealing with customizing it.
This document contains:
- Programs/applications/scripts to aid you in securing or monitoring your box.
- Misc links that will feed your mind.
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