Update .NET web service to use TLS 1.2

Question

I need to use TLS 1.2 to connect from my .NET web service to another that is going to force TLS 1.2. I found a resource that said .NET 4.6 uses TLS 1.2 by default so that sounded like the easiest solution. I updated the .NET framework on the server and restarted. In IIS I tried to make an application pool using .NET 4.6 but 4.0 was the only option. Then I found something that said it would still say 4.0 because 4.6 is an "in place" update to .NET 4.0. So I thought maybe I was done. However on an error page that I got for unrelated reasons, it said Microsoft .NET Framework Version:4.0.30319 so it seems I have not successfully upgraded. Any pointers on how to make sure my application pool is using .NET 4.6, or more generally how to enable TLS 1.2?

Answer 1

I need to use TLS 1.2 to connect from my .NET web service to another that is going to force TLS 1.2. I found a resource that said .NET 4.6 uses TLS 1.2 by default so that sounded like the easiest solution. I updated the .NET framework on the server and restarted. In IIS I tried to make an application pool using .NET 4.6 but 4.0 was the only option. Then I found something that said it would still say 4.0 because 4.6 is an "in place" update to .NET 4.0. So I thought maybe I was done. However on an error page that I got for unrelated reasons, it said Microsoft .NET Framework Version:4.0.30319 so it seems I have not successfully upgraded. Any pointers on how to make sure my application pool is using .NET 4.6, or more generally how to enable TLS 1.2?

Answer 2

I need to use TLS 1.2 to connect from my .NET web service to another that is going to force TLS 1.2. I found a resource that said .NET 4.6 uses TLS 1.2 by default so that sounded like the easiest solution. I updated the .NET framework on the server and restarted. In IIS I tried to make an application pool using .NET 4.6 but 4.0 was the only option. Then I found something that said it would still say 4.0 because 4.6 is an "in place" update to .NET 4.0. So I thought maybe I was done. However on an error page that I got for unrelated reasons, it said Microsoft .NET Framework Version:4.0.30319 so it seems I have not successfully upgraded. Any pointers on how to make sure my application pool is using .NET 4.6, or more generally how to enable TLS 1.2?

Answer 3

I need to use TLS 1.2 to connect from my .NET web service to another that is going to force TLS 1.2. I found a resource that said .NET 4.6 uses TLS 1.2 by default so that sounded like the easiest solution. I updated the .NET framework on the server and restarted. In IIS I tried to make an application pool using .NET 4.6 but 4.0 was the only option. Then I found something that said it would still say 4.0 because 4.6 is an "in place" update to .NET 4.0. So I thought maybe I was done. However on an error page that I got for unrelated reasons, it said Microsoft .NET Framework Version:4.0.30319 so it seems I have not successfully upgraded. Any pointers on how to make sure my application pool is using .NET 4.6, or more generally how to enable TLS 1.2?

Answer 4

I need to use TLS 1.2 to connect from my .NET web service to another that is going to force TLS 1.2. I found a resource that said .NET 4.6 uses TLS 1.2 by default so that sounded like the easiest solution. I updated the .NET framework on the server and restarted. In IIS I tried to make an application pool using .NET 4.6 but 4.0 was the only option. Then I found something that said it would still say 4.0 because 4.6 is an "in place" update to .NET 4.0. So I thought maybe I was done. However on an error page that I got for unrelated reasons, it said Microsoft .NET Framework Version:4.0.30319 so it seems I have not successfully upgraded. Any pointers on how to make sure my application pool is using .NET 4.6, or more generally how to enable TLS 1.2?

Answer 5

I need to use TLS 1.2 to connect from my .NET web service to another that is going to force TLS 1.2. I found a resource that said .NET 4.6 uses TLS 1.2 by default so that sounded like the easiest solution. I updated the .NET framework on the server and restarted. In IIS I tried to make an application pool using .NET 4.6 but 4.0 was the only option. Then I found something that said it would still say 4.0 because 4.6 is an "in place" update to .NET 4.0. So I thought maybe I was done. However on an error page that I got for unrelated reasons, it said Microsoft .NET Framework Version:4.0.30319 so it seems I have not successfully upgraded. Any pointers on how to make sure my application pool is using .NET 4.6, or more generally how to enable TLS 1.2?

Answer 6

I need to use TLS 1.2 to connect from my .NET web service to another that is going to force TLS 1.2. I found a resource that said .NET 4.6 uses TLS 1.2 by default so that sounded like the easiest solution. I updated the .NET framework on the server and restarted. In IIS I tried to make an application pool using .NET 4.6 but 4.0 was the only option. Then I found something that said it would still say 4.0 because 4.6 is an "in place" update to .NET 4.0. So I thought maybe I was done. However on an error page that I got for unrelated reasons, it said Microsoft .NET Framework Version:4.0.30319 so it seems I have not successfully upgraded. Any pointers on how to make sure my application pool is using .NET 4.6, or more generally how to enable TLS 1.2?

Answer 7

I'm wanting to use the code provided by Etienne Faucher.

However, how would I do this for a .Net console app, not an IIS/web app?

<system.web>
    <compilation targetFramework="4.6"/> <!-- Changed framework 4.0 to 4.6 -->

    <!--Added this httpRuntime -->
    <httpRuntime targetFramework="4.6" />

    <authentication mode="Windows"/>
    <pages controlRenderingCompatibilityVersion="4.0"/>
</system.web>