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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-39970] Report all handshake errors to client</title>
                <link>https://jira.mongodb.org/browse/SERVER-39970</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Related to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39941&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-39941&lt;/a&gt;, if a server is configured with TLS on and the client connects without TLS, the server outputs the following in its log:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2019-03-04T23:22:20.337+0000 D -        [conn27] User Assertion: 17189:The server is configured to only allow SSL connections src/mongo/util/net/message_port.cpp 152&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2019-03-04T23:22:20.337+0000 D -        [conn27] User Assertion: 17189:The server is configured to only allow SSL connections src/mongo/db/service_entry_point_mongod.cpp 132&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2019-03-04T23:22:20.337+0000 I -        [conn27] AssertionException handling request, closing client connection: 17189 The server is configured to only allow SSL connections&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2019-03-04T23:22:20.337+0000 I -        [conn27] end connection 127.0.0.1:41224 (1 connection now open)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;On the client side, the client only gets its connection closed, and provides the following diagnostics:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[2019/03/05 12:11:46.568] W, [2019-03-05T17:11:45.067404 #3004]  WARN -- : MONGODB | Failed to handshake with localhost:27017: Mongo::Error::SocketError: EOFError: end of file reached (for 127.0.0.1:27017 (no TLS))&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;As with 39941, it is impossible to determine the reason why the connection failed from the client side.&lt;/p&gt;

&lt;p&gt;While in 39941 the idea is to use the openssl alert mechanism to communicate errors to the client, the failure cases covered by this ticket require a different strategy to report them. Perhaps the server can write a simple (or simplified) ismaster response, even in plain text if the server determines that the client connected without TLS to a TLS server, and wait for a minute to close the connection. Normally the driver would write an ismaster request to the server immediately after opening a connection, hence even with the server not reading the request and writing a predetermined ismaster response this should provide reasonable diagnostics to the client to debug connection failures.&lt;/p&gt;</description>
                <environment></environment>
        <key id="710197">SERVER-39970</key>
            <summary>Report all handshake errors to client</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="oleg.pudeyev@mongodb.com">Oleg Pudeyev</reporter>
                        <labels>
                    </labels>
                <created>Tue, 5 Mar 2019 19:52:09 +0000</created>
                <updated>Mon, 8 Jan 2024 15:23:13 +0000</updated>
                            <resolved>Tue, 12 Mar 2019 18:04:16 +0000</resolved>
                                    <version>4.1.8</version>
                                                                        <votes>1</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2178665" author="jason.carey" created="Tue, 12 Mar 2019 18:04:09 +0000"  >&lt;p&gt;I&apos;m uncomfortable trying to special case getting random bytes for a server that&apos;s trying to negotiate TLS.  It might be a client connecting with a non-tls mongodb wire protocol handshake, it might also be any other protocol at all.  Pre-emptively spamming out isMaster responses to unrelated traffic feels off, and attempting to read enough bytes out of the socket to figure out if it is mongodb wire traffic (and responding appropriately) seems error prone.&lt;/p&gt;

&lt;p&gt;Unlike &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39941&quot; title=&quot;Report TLS handshake errors to client&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39941&quot;&gt;SERVER-39941&lt;/a&gt;, I think the case where you&apos;ve connected to a TLS server with a non-TLS client is reasonably debuggable (checking TLS is an obvious avenue).  So I&apos;m going to decline this wontfix.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="708909">SERVER-39941</issuekey>
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