PowerShell Compare-Hash Function

Quite some time ago I created a PowerShell function which allowed one to compare a given cryptographic hash against one locally generated to see if they match. Looking back on the old version (here is a link to the blog article https://www.bytesizedalex.com/powershell-cryptographic-hash-checker/) it is very much reminiscent of old school batch files. I decided now … Read more

VMware vCenter Certificate Management Default Values

If you have ever replaced VMware vCenter server certificates you will know that there are default values for common SSL/TLS certificate attributes, for example country code and organisation name. By default VMware have their own details for these attributes as shown below – Country – US E-mail – [email protected] Locality – Palo Alto Organisational Unit … Read more

Microsoft Nano Server Version 1709 Changes

Microsoft are making some big changes to their Nano Server operating system. I’m going to briefly cover what they are doing and consider how it might impact existing users and future plans for those of us who have not yet deployed it into a production environment. The below was taken from the following Microsoft link … Read more

Visual Studio Code and Team Services Integration

I finally got round to creating my colleagues and I an account on Microsoft Visual Studio Team Services (VSTS). If you haven’t looked into it then basically it is the cloud version of Microsoft Team Foundation Server (TFS) which is typically run within your own environment and managed internally. We have been looking to move … Read more

Speaking at Technology UG

Well I had an amazing time at Technology UG in Manchester this week. Speaking was fun and hearing from the other speakers and generally interacting with the guests was a great experience. I would happily take another days annual leave to attend or speak at one again, maybe next time work will let me go without … Read more

Technology UG Event in Manchester

How exciting! I’ve been asked to speak at a Technology UG event in Manchester on May 18th – here’s a link to their website along with the event page. http://www.technologyug.co.uk http://www.technologyug.co.uk/Events/Manchester/TechUG-Manchester-Thurs-18th-May-2017 My talk has been titled “Running Production Hyper-V and vSphere – A User Comparison Analysis” and will cover our journey from a single hypervisor … Read more

Unexpected Large Page File Troubleshooting

This week one of my colleagues has been performing updates on our hypervisor hosts including those running Hyper-V. During this work we received alerts from our monitoring system to indicate two of the hosts had essentially run out of disk space, obviously a little worrying. We stopped the update process while troubleshooting was carried out … Read more

Error Lookup With net helpmsg Command

Microsoft provide a convenient command line tool which allows you to lookup error codes and be provided with the text description relating to that code. It may be something you’ve not come across before so this quick post will hopefully be useful. If you are familiar with the net commands (e.g net user, net localgroup, … Read more

HPE 3PAR Remote Copy Volumes Both Read Only

I recently ‘enjoyed’ working on an issue where a 3PAR remote copy group issue resulted in both virtual volumes entering a read-only state. I’ve seen a similar problem where both copies go into a read-write state which is probably more worrying when it happens. Let’s take a look at the problem, the data I had … Read more

Configure HTTP Strict Transport Security HSTS htaccess

I configured my site for HTTP Strict Transport Security (HSTS) a while back and being satisfied it was all running OK I figured it was about time I configure my site to be preloaded in popular browsers. When I went to the hstspreload.org website to submit my site I received an interesting message – Unnecessary HSTS header over … Read more