Hosts File
Last week I ran into a problem with a staging server that appeared to be super slow to the user. It was throwing this error:
System.Net.WebException: The underlying connection was closed: Unable to connect to the remote server.
Since this server is in a cluster it went unnoticed for awhile. It turned out to be an IP address typo in the hosts file on that server.
The hosts file can be found at:
%SystemRoot%\system32\drivers\etc\hosts
Something to remember if you are using a hosts file.
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