Menu
After installing certificate into Local Computer storage of Trusted Root Certification Authorities the .NET WebRequest still throws:
The request was aborted: Could not create SSL/TLS secure channel
ServicePointManager.SecurityProtocol now contains SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls.
After reading Simon Dugré's answer https://stackoverflow.com/a/2904963/121968, I have set:
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
It works ok. After setting back:
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls;
it still works ok. I have two questions:
Why it still works? Is there sort of caching?
And why it was previously working just with flag Ssl3 only and not
with both Ssl3 and Tls?
539
The error “The request was aborted: Could not create SSL/TLS secure channel.” can happen during any download HTTP request. This error generally will correspond to firewalls, proxies or DNS filtering blocking the connection or an SSL/TLS cipher misconfiguration.
However, the "Could not create SSL/TLS secure channel" error usually means that there's something wrong with the server certificate, e.g. the certificate is for a different hostname, or otherwise invalid, or not trusted etc.
There is SSL/TLS session resumption, probably that's your case. Maybe you do not have shared TLS1 ciphersuites. The best way to check is to run Wireshark, and see SSL packets for your connection, they are very good explained in Wireshark.
95
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
