HTTPS Connection Issues

Full Title or Meme

Like most security protocols HTTPS can start failing for all sorts of reasons, but issues with upgraded security seems to be most common.

Issues

PowerShell Invoke-xxxMethod

$r = Invoke-RestMethod "https://trustregistry.us/csp" -Method Post -Body $j -ContentType "application/jose"
$r
The registry service https://localhost:5035/csp could not be found. Exception: The SSL connection could not be established, see inner exception.

or on AWS

$r = Invoke-RestMethod "http://localhost:5035/csp" -Method Post -Body $j -ContentType "application/jose"
Invoke-RestMethod : The underlying connection was closed: The connection was closed unexpectedly.
At line:1 char:6
+ $r = Invoke-RestMethod "http://localhost:5035/csp" -Method Post -Body ...
+      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

• unexpected occurances

One common cause for this issue is a mismatch in TLS levels between the client and server. In general all side should be (2020-07) set for tls1.1 or higher.

• Check with powershell Get-TlsCipherSuite [[-Name] <String>] [<CommonParameters>]