From ba4b84d7f454119ac90d191c2389c5ba8d0438fe Mon Sep 17 00:00:00 2001
From: Sebastiaan Janssen <sebastiaan@umbraco.com>
Date: Mon, 21 Jan 2019 11:09:13 +0100
Subject: [PATCH] Fixes #4166 - Outgoing connections sometimes fail because
 they require TLS 1.2

---
 src/Umbraco.Web/WebBootManager.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Umbraco.Web/WebBootManager.cs b/src/Umbraco.Web/WebBootManager.cs
index 7863033c4b..dbab3d2346 100644
--- a/src/Umbraco.Web/WebBootManager.cs
+++ b/src/Umbraco.Web/WebBootManager.cs
@@ -4,6 +4,7 @@ using System.Collections.Specialized;
 using System.Configuration;
 using System.IO;
 using System.Linq;
+using System.Net;
 using System.Web;
 using System.Web.Configuration;
 using System.Web.Http;
@@ -130,6 +131,10 @@ namespace Umbraco.Web
             InstallHelper insHelper = new InstallHelper(UmbracoContext.Current);
             insHelper.DeleteLegacyInstaller();
 
+            // Tell .net 4.5 that we also want to try connecting over TLS 1.2, not just 1.1
+            if (ServicePointManager.SecurityProtocol.HasFlag(SecurityProtocolType.Tls12) == false)
+                ServicePointManager.SecurityProtocol = ServicePointManager.SecurityProtocol | SecurityProtocolType.Tls12;
+
             return this;
         }