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Month: August 2022

IIS Crypto and Azure DevOps Agent SSL Issue

Published by xavier on August 19, 2022

Ran across a problem all of a sudden with Azure DevOps agents giving me an SSL connection error. This seemed to be only affecting Windows 2012 R2 servers.

AgentServer] System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.

You’ll have to make sure to enable or re-enable the following ciphers by going into the Cipher Suites in IIS Crypto. This works even if you use the “Best Practices” or “PCI 3.2” template.

Also, enabling the “Server Defaults” template works as well because it re-enables those ciphers.

TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256

I found some information about this issue here: Azure DevOps Agent installed on Windows Server 2012 R2 unable to TLS1.2 handshake with Azure Devops Agent Server https://developercommunity.visualstudio.com/t/azure-devops-agent-installed-on-windows-server-201/1651426

IIS Crypto can be found here: https://www.nartac.com/Products/IISCrypto

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Getting error An unhandled exception has occurred. See browser dev tools for details.

Published by xavier on August 11, 2022

I deleted all the CSS from site.css and replaced it with mine of course but after that, I started receiving the following error “Getting error An unhandled exception has occurred. See browser dev tools for details. Reload”. It looks like this occurs because blazor needs at least 2 styles to display errors.

Found my answer here.

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

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