NET Framework 3.5, be sure to upgrade to at least this version of AWSSDK.Core. NET Framework, assuming the underlying OS has been updated to support the newer TLS versions. In version 3.3.22.0 of AWSSDK.Core we made a change to force newer TLS protocols into the list of client acceptable protocols, even in older versions of the. NET Framework 4.7 ages, it can still use newer protocols automatically when the underlying OS is updated. NET Framework 4.7 the enum protocol was improved by having a new Default value, which puts the control into what protocols are supported to whatever the underlying OS supports. NET Framework new enum values were added for TLS 1.1 and TLS 1.2. NET Framework, regardless of the underlying OS being upgraded to support newer TLS versions.įor the 4.6 release of the. What this enum unintentionally did was restrict the supported protocols to the ones known at the time of that release of the. Later versions of the framework added the Tls11 and Tls12 members. Notice Tls doesn’t have a version number because only one existed at the time. NET Framework, you can see it only lists Ssl3 and Tls. In fact, if you look at the documentation of the enum in the 4.5 version of the. NET Framework were released before TLS 1.1 existed, so by default, when the HTTP clients in these versions attempt to make an HTTPS connection, they tell the service they only support SSL 3.0 and TLS 1.0. To help improve internet security, support for SSL 3.0 and TLS 1.0 are being dropped from many internet services, and new AWS services will not support these protocols. A new TLS 1.3 version was recently approved and in the future we can expect languages and platforms to start adding support for it. The client tells the service what protocols it understands and the service responds back, agreeing to talk to the latest supported protocol that they both support. When a connection is made over HTTPS a handshake is made between the client and the service. NET Framework, this can affect your ability to access AWS services with the AWS SDK for. This trend is true at AWS as well, and many of our services currently support only newer encryption protocols. BackgroundĪ growing trend across the internet is for HTTPS services to only accept connections using newer encryption protocols and refusing support for older protocols. This ensures you are using the latest HTTPS protocols and can communicate with newer AWS services. NET Framework 3.5 or 4.5 you should update to version 3.3.22.0 or later of AWSSDK.Core.
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