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Sysinternals netmon12/20/2023 Afterwards, the certificate check was able to successfully validate through out proxies: Some research revealed we needed to configure winhttp to use a proxy*. It may be unsafe to proceed… You cannot proceed because authentication is required.”Ī netmon captured revealed that the process handling the Crypto API was trying to connect directly to certificate servers in the cloud instead of using the proxy our user’s were situated behind: I tried the site myself with Netmon capturing a trace and saw the remote server was trying to establish a secure connection through a port other than common 443:Īnd here where printing from a remote app was failing to pass through our TMG proxy:Īnother example was the following error when any user would try to launch a remote desktop application to an external resource: “ The remote computer could not be authenticated due to problems with its security certificate. For example, a user unable to logon to a some external server, receiving the follow error: “ The remote server returned an error: (502) Bade Gateway” I have used it more than a few times to troubleshoot client side applications that fail to connect to external resources for whatever reason. You don’t necessarily need to be a network guru to use Microsoft Network Monitor. Crashing Config Manager Client & Remote Control Viewer after Windto 1709 Update.The Case of the Dysfunctional Adobe PDF Plugin.The Case of the Missing Image Preview Tiles.
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