.Net 4: Could not create SSL/TLS secure channel

[Osiris]

@davidb001

I am using a web hosting provider, so I do not have control over anything to install ciphers. The only thing I can change is the kind of letsencrypt certificate (SHA1/SHA256, along with key size).

Does it mean I have to look for a new hosting provider with more cipher suites supported?

Please read more carefully:

@Osiris

The cipher suits used are not determined by the certificate, except perhaps the RSA versus ECDSA part in the TLS 1.2 and older suits.

Currently, you're using a RSA certificate, which limits your TLS 1.2 cipher suits to TLS_..._RSA_... variants. Now, if you'd generate an ECDSA certificate...... You do the math

It's funny by the way how very different the website of your hosting provider itself is configured:

https://www.ssllabs.com/ssltest/analyze.html?d=x10hosting.com&latest