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Restore Missing or Invalid Root Certificates on Windows

Microsoft Windows comes pre-installed with Trusted Root Authority certificates. These certificates are used across Windows and browsers to verify the identity of trusted computers and websites. If for some reason these certificates get deleted, corrupted, or out-dated, you'll start to get certificate warnings with no real indication of where the problem is. The way to [...]

By | 2017-06-29T15:52:28+00:00 June 29th, 2017|Categories: Windows|Tags: , , , , , |0 Comments

How To Update Site Certificate For ADFS Windows Server 2012

If you run a Microsoft ADFS Server on Windows Server 2012, there will probably be a time when you'll need to update your site certificate on the server. In my case, I use a wildcard certificate for my domain, for example *.tecklyfe.com so that all subdomains can use the same certificate. When you update the [...]

By | 2017-02-09T07:35:12+00:00 February 8th, 2017|Categories: System Administration, Windows|Tags: , , , , , , , |0 Comments

Microsoft Edge and Internet Explorer 11 Will Block Websites with SHA-1 Certificates

Beginning February 14th, 2017, the Microsoft Edge browser and Internet Explorer 11 (IE11) will start blocking websites with a SHA-1 certificate. The browsers will prevent sites that are protected with a SHA-1 certificate from loading and will display an invalid certificate warning. Users will have the option to ignore the error and continue to the [...]

HTTP/2, HTTPS, Let’s Encrypt, NGINX and WordPress Hardening

If you're running a Wordpress site on a Linux server running NGINX, then you might be interested in setting up a free SSL (HTTPS) certificate using Let's Encrypt. The internet is moving towards HTTPS, and even Google is said to rank HTTPS pages higher than the standard HTTP pages. If you're using Wordpress, you have [...]

JAMF Could Allow For MITM Attack

JAMF Software has a number of solutions for fleet management of Apple products, including their own Apple MDM. The issue discussed in this post applies to the self-hosted JAMF Casper Suite and deploying a JSS. This suite of tools includes software that will help track inventory, manage devices, implement security policies, and deployment of software [...]

By | 2016-10-16T15:53:53+00:00 September 12th, 2016|Categories: Attacks, Security|Tags: , , , , , , , , , , |0 Comments

Tech Tip: Fix For “Windows was unable to find a certificate to log you on to the network” error on Windows XP

When you try to logon the wireless network, you may end up getting this error message: “Windows was unable to find a certificate to log you on to the network xxxx”. This error is normally related to the authentication on a wireless network, usually because the Windows is looking for 802.1x connection by mistake. Step [...]

By | 2016-10-16T15:56:00+00:00 November 12th, 2014|Categories: Tech Tips|Tags: , , , |0 Comments