Setup OpenDNS for your Home Network

In a recent project, I started using OpenDNS over other available options. Initially, my home network was using my ISP’s DNS servers. They’re slow and do almost nothing to keep my information safe. So, why, OpenDNS?   Websites load faster and have a guaranteed uptime of 100%.  Its highly customizable, allowing users to pick and choose […]

Read More Setup OpenDNS for your Home Network

Configuring SSL/TLS on Nagios

This post describes how to configure SSL/TLS on your Nagios server. During the initial setup, I’m using CentOS 7.x. yum install -y mod_ssl openssl Next, go to root’s home directory. If you are not logged in as root, go ahead and do so. cd ~ Next will need to generate a Private Key File. This […]

Read More Configuring SSL/TLS on Nagios

Install VNC-Server on CentOS 7

First, i logged into my server as root, to make things a little easier. I would recommend doing the same thing to help speed up the processes. After I logged into the system, I installed VNC-server.  yum install tigervnc-server Once all the packages were installed, go ahead and run an update. yum -y update && […]

Read More Install VNC-Server on CentOS 7

Slow SSH Login | UseDNS=no

Problem: When SSH’ing into a server, connection, and login take a long time. Connect to a server Attempt to log in, and wait to see how long the connection takes. 10+ seconds is too long and should be investigated. Wait for the password prompt and then proceed to  cat /etc/ssh/sshd_config | less use vi to […]

Read More Slow SSH Login | UseDNS=no

Wireshark | Getting Started

Wireshark is an open source packet analyzer, software analysis, network troubleshooting tool. What does it do? Wireshark allows its user to view raw data that is being transmitted over a network. Its main purpose is to encapsulate network packets so they can be analyzed for troubleshooting an issue. How is it different from TCPdump? Wireshark is […]

Read More Wireshark | Getting Started


nload is a command line tool that is used to monitor network traffic and bandwidth usage in real time. It displays inbound and outbound traffic using two graphs. While providing additional information like total transferred data and the minimum/maximum network usage. (See Below) First, we’ll need to install the application: Linux $ sudo apt-get install […]