From 72a237dcf257f6897a1d09329aefc4a901485c89 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=9B=BD=E4=BC=9F?= <366193849@qq.com>
Date: Mon, 18 Nov 2024 16:00:48 +0800
Subject: [PATCH 1/2] Set the default value of SslProtocol to
 SslProtocols.None.

---
 .../MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs b/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs
index 135e012d6..d0ae7cce5 100644
--- a/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs
+++ b/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs
@@ -22,7 +22,7 @@ public MqttServerTlsTcpEndpointOptions()
 
         public bool CheckCertificateRevocation { get; set; }
 
-        public SslProtocols SslProtocol { get; set; } = SslProtocols.Tls12;
+        public SslProtocols SslProtocol { get; set; } = SslProtocols.None;
 
         public System.Net.Security.CipherSuitesPolicy CipherSuitesPolicy { get; set; }
     }

From 8b6e0c13751984a58a63f22962b6dbc397f56092 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=9B=BD=E4=BC=9F?= <366193849@qq.com>
Date: Sat, 30 Nov 2024 21:29:40 +0800
Subject: [PATCH 2/2] Add summary of SslProtocol.

---
 .../MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs b/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs
index d0ae7cce5..fb8a1b02c 100644
--- a/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs
+++ b/Source/MQTTnet.Server/Options/MqttServerTlsTcpEndpointOptions.cs
@@ -22,6 +22,10 @@ public MqttServerTlsTcpEndpointOptions()
 
         public bool CheckCertificateRevocation { get; set; }
 
+        /// <summary>
+        /// The default value is SslProtocols.None, which allows the operating system to choose the best protocol to use, and to block protocols that are not secure.
+        /// </summary>
+        /// <seealso href="https://learn.microsoft.com/en-us/dotnet/api/system.security.authentication.sslprotocols">SslProtocols</seealso>       
         public SslProtocols SslProtocol { get; set; } = SslProtocols.None;
 
         public System.Net.Security.CipherSuitesPolicy CipherSuitesPolicy { get; set; }