Monitoring is an important activity in IT operations, it’s essential for correlating the state of all the moving parts of our systems and applications and create a big picture of the health of the whole environment. Before going down the rabbit hole of complicated monitoring tools and techniques let’s start with define a that monitoring can be subjective and on a case-by-case can be very basic or detailed and can let you choose a specific tool or strategy. There is no one-size-fits-all. This week I needed to implement a custom check to monitor the network load/usage on any Windows OS and instead of looking for a third-party tool and deploying maybe another agent on servers I wrote a Powershell script to perform this activity.
Last December NIST announced this vulnerability CVE-2019-19781 and soon after that Citrix published this page CVE-2019-19781 – Vulnerability in Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance and released a verification tool supporting clients for finding out if they were vulnerable or not: CVE-2019-19781 – Verification Tool
A verification tool is addressed to an IT specialist who works these solutions and needs to quickly assess if the software or appliance is affected by this vulnerability. Continue reading “Comparing Citrix CVE Verification Tool to a one-liner bash script”
IT infrastructures and services management was and still is today an important part of my ‘business as usual‘ set of activities. Regardless of the tools and technologies implemented what I look for are always two features for monitoring and automation, simplicity and efficiency.
If monitoring is essential for having visibility on the overall infrastructure and for being proactive, automation is necessary for delivering consistent results in a timely manner especially in complex scenarios.
There are tools that are extremely useful and once configured properly will last a long time with little or no maintenance required at all. Web servers are a common example of tools that come to my mind that can be a swiss-army knife and serve a lot of purposes.
Whether you choose Apache, Nginx or IIS, just to pick some of the most famous ones, it’s very important to know at least most of the features that they offer. So it’s very important to get familiar with at least one of them, reading the documentation and start experimenting a bit.