Category Archives: Linux

Fedora 15 Default Run-level
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Posted on July 11, 2011 by

There were many changes made to Fedora 15, one of the ones that I keep running into is how to change the default run-level of your box.  I use Fedora as a server OS in many situations because it offers … Continue reading →

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Linux File Permissions
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Posted on July 8, 2011 by

When you are first starting out using Linux, file permissions while being an easy concept to understand seem like they are very hard to setup.  Most of the time you will see a three digit number which “magically” will determine what the permissions are … Continue reading →

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Mounting folders through SSH
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Posted on July 7, 2011 by

One of the first rules of security is to not have any ports open which you do not need to have open.  That is also pretty common sense.  One problem you run into though is you still need to access … Continue reading →

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Setting a Lock-out Policy
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Posted on June 29, 2011 by

Setting a lock out policy in CentOS or Fedora is very easy. edit /etc/pam.d/system-auth auth required pam_tally.so onerr=fail no_magic_root account required pam_tally.so deny=3 unlock_time=3600 no_magic_root reset onerr=fail if there is a problem opening the file for some reason fail login no_magic_root … Continue reading →

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Configuring iptables
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Posted on June 28, 2011 by

In Linux the most basic way of protecting you machine is with iptables.  Iptables is a firewall that comes preinstalled and configured on MOST Linux distros.  I say most because Arch does not preinstall it since that would conflict with their bare-bones … Continue reading →

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