Nagios is an awesome Open Source monitoring tool, its provides you more comprehensive monitoring environment to always keep an eye on your all machines / networks whether you are in a your data center or just your small labs.
With Nagios, you can monitor your remote hosts and their services remotely on a single window. It shows warnings and indicates if something goes wrong in your servers which eventually helps us to detect some problems before they occur. It helps us to...
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Saturday, April 12, 2014
Friday, April 11, 2014
Wake of the Heartbleed Bug
Finding
a faulty car part used in nearly every make and model, but you can't
recall the Internet and all the data you put out on is more simple version of the HeartBleed Bug. More improved version or more details version, a
flaw in the OpenSSL open source encryption toolkit that potentially
allows for the unrestricted access to server memory, is an incredibly
big deal. For the past two years, much of our private online data --
including passwords, credit card information, billing addresses and
user names -- stored on some of the...
Wednesday, March 19, 2014
Free and open-source software OS
When it comes to securing network infrastructure, the trend is to invest in commercial-grade appliances. Sadly, security designers tend to ignore the built-in security features available in FOSS distros. This article explains a few such features, and will help readers decide when and how to use them in a given network scenario.
Before we talk about the various features built into FOSS systems, we need to understand some terminology as well as the various attack methods. A network is typically divided into LAN and WAN, wherein the LAN can have...
Monday, March 17, 2014
SElinux security contexts
This article discusses security contexts for subjects (typically, processes) and how they are assigned. To view the list of processes on your system, along with their hierarchy, use the pstree command:
[root@vbg-work ~]# pstree
init-+-NetworkManager-+-dhclient
| `-{NetworkManager}
|-abrtd
|-acpid
|-atd
|-auditd-+-audispd-+-sedispatch
| | `-{audispd}
| `-{auditd}
|-avahi-daemon---avahi-daemon
|-bonobo-activati---{bonobo-activat}
|-cimserver---3*[{cimserver}]
...
The Art of Guard - Part VII
To test the effects of the new module, let us create a sample index.html file in the DocumentRoot folder of Apache:
[root@vbg ~]# echo "The Art of Guard - Part VII " > /var/www/html/index.html
[root@vbg ~]# service httpd start
To check if all is fine, let us view the Web page using elinks:
[root@vbg ~]# elinks --dump http://localhost
The Art of Guard - Part VII
This shows that all is indeed fine and Apache can serve our document on the website. Let us now change the type of index.html to lfy_t and see what...
