Tracing a TCP Connection Failure

A sysadmin often has to facilitate requests to provide access from the network they manage to resources hosted by an external party. If the target resource cannot be accessed, they have to establish whether this is due to the traffic being blocked by a device on their network or by...

Avaya CMS - Deletion of a Designer Report Owner

As a sysadmin one of my responsibilities is the management of an Avaya telephone system, a component of which is Avaya Call Management System (CMS). Avaya CMS collects call traffic data and provides a means of reporting against it. In addition to the reports included as standard, CMS also provides...

Cross-Platform Usage of Nslookup

I recently discovered a problem with the domain name of a website I manage. Attempting to resolve a DNS record which had been created a few days earlier was resulting in intermittent failures. This post details the process I used to diagnose the problem with nslookup and how I turned...

WordCamp London 2019 - CLI Tools and Shells

WordCamp London (WCLDN) was held at the London Metropolitan University on 5th - 7th April 2019. The first day was to promote contributing to the WordPress project, followed by a two day conference. I attended both days of the conference.

List the Supported TLS Cipher Suites on a Host

I was recently assigned the task of configuring TLS cipher suite settings on a number of hosts (servers and other devices). Whilst making the configuration changes I required a means of testing which cipher suites were enabled. I needed to be able to quickly and easily repeat the tests until...

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