Denyhost 2.6 on CentOS 6.5

Denyhosts is another utility similar to fail2ban. It parses log files toidentify potential attacks against SSH services. A clear advantage thatDenyhosts has over fail2ban is the synchronisation mechanism sinceversion 2.0[1]. Denyhostspermits communication with a central server to exchange informationabout denied hosts by other Denyhosts daemons. However unlike fail2ban,it does not modify any firewall (iptables) rules, instead it relies ontcpwrapper and the hosts.deny file to block ssh access.

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Configuring RANCID on CentOS 6.5

RANCID stands for really awesome new cisco configuration differ[1]and polls Cisco devices to geta copy of the configuration and an inventory of the hardware and commitsthe details to a version control system such a CVS or SVN. The versioncontrol is used to maintain a history of the changes, and any changes tothe configuration are reported. There are a number of guides availablefor installing RANCID[2,4,5], but I’ve documented thesteps I took here for my reference.

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Installing OpenVPN 2.2 on CentOS 6.3 64bit

This post is just an update of a previous post that used CentOS 5.7 andOpenVPN 2.2(http://nkush.blogspot.com.au/2011/10/installing-openvpn-22-on-centos-57.html).The basic instructions are the same, however this post uses some newerpackages which may have been relocated to new URLs. Again this blog andthe posts are mostly for my own reference and not intended asstep-by-step instuctions for other systems/network administrators Install RPMForge or RepoForge as it’s now known[1] wgethttp://pkgs.

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