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  • Blog

    AIA Location #2 – Unable to download

    While setting up my Two-Tier PKI Hierarchy, I ran into an error on my issuing CA where my AIA Location #2 was unable to download. I viewed this error using the PKIVIEW tool. I right clicked on the AIA Location # 2 and copied the URL. From there, I opened a web browser and paste the…

    Concurrency
  • Blog

    ServiceNow Test Management: Accelerate the Management of Testing Processes

    Getting Started If you don’t know already, ServiceNow provides some amazing toolsets that allow your organization to author tests and simplify the overall testing experience of a software application within your instance. You might think that I’m talking about “Automated Test Framework”, but I’m actually speaking to “Test Management”. This feature is located within the…

    Concurrency
  • Blog

    Attack Surface Analyzer

    Overview and Uses Attack Surface Analyzer, shortened as ASA, is used to compare or track the state of a server as changes are made.  It is specifically geared towards DevOps or security engineers for seeing what changes 3rd party software software makes to the system, with the goal of analyzing it for potential security risks.  However,…

    Concurrency, Inc.
  • Blog

    Key-based Authentication for OpenSSH on Windows

    This is a follow up to a previous post: Getting Started with SSH on Windows Server 2019.  If you haven’t yet installed and configured SSH, start by reading that first. Key-Based Authentication Overview The previous post leaves off with SSH enabled and working with username and password authentication.  If you want to enable key-based auth instead, you…

    Concurrency
  • Blog

    Troubleshooting Blocked Ports

    One of the more common networking issues we look at is where some or all ports between servers are being blocked.  Typically, this is due to a misconfiguration, but being able to find the details of the issue is invaluable in tracking down the cause. Basic Port Tests When testing for blocked ports, it’s important…

    Concurrency
  • Uncategorized

    Changes to Cross-forest Kerberos Delegation

    Microsoft is planning to introduce a security update in July 2019 that will alter the way Kerberos delegation across forest trusts work.  If ignored, this update could negatively impact applications that rely on unconstrained delegation across a forest trust. Vulnerability Details There is a security concern in the default configuration for forest trusts that has…

    Concurrency, Inc.
  • Blog

    Fixing Invoke-WebRequest

    Recently, we noticed that build times for Terraform deployments in Azure DevOps were taking an unusually long time, sometimes as much as three to five minutes per build. Upon further investigation, one of the steps that held up the build process the longest was the step to download Terraform. The download step, which downloads terraform…

    Concurrency, Inc.
  • Blog

    Managed Service Accounts

    Managed Service Accounts are a Windows feature introduced in Windows Server 2008 R2 for increasing the security of non-user service accounts.  Managed Service Accounts, shortened as MSAs, have an automatically-managed, complex password that removes the requirement of manually dealing with password rotation and security.  In Server 2012, this feature was enhanced to group Managed Service…

    Concurrency, Inc.
  • Blog

    Create a Simple Ticketing System in SharePoint Online

    I was recently tasked with creating a simple help desk ticketing system in SharePoint Online and Office 365 for a client. While I fully understood from the start that OOTB functionality in SharePoint wouldn’t provide the best means for accomplishing this task, I was pleased to discover that it is surprisingly capable of offering the…

    Concurrency