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<h1 class="title">client.conf(5)</h1>
<h2 class="title"><a name="NAME">Name</a></h2>
-client.conf - client configuration file for cups
+client.conf - client configuration file for cups (deprecated on macos)
<h2 class="title"><a name="DESCRIPTION">Description</a></h2>
-The <i>client.conf</i> file configures the CUPS client and is
-normally located in the <i>/etc/cups</i> or <i>~/.cups</i>
-directory. Each line in the file can be a configuration
-directive, a blank line, or a comment. Comment lines start with
-the # character.
-<h2 class="title"><a name="DIRECTIVES">Directives</a></h2>
-The following directives are understood by the client. Consult the
-on-line help for detailed descriptions:
-<p style="margin-left: 5.0em; text-indent: -5.0em">Encryption IfRequested
-<br>
-<p style="margin-left: 5.0em; text-indent: -5.0em">Encryption Never
-<br>
-<p style="margin-left: 5.0em; text-indent: -5.0em">Encryption Required
-<br>
-<br>
-Specifies the level of encryption that is required for a particular
-location.
-<p style="margin-left: 5.0em; text-indent: -5.0em">GSSServiceName name
-<br>
-Specifies the Kerberos service name that is used for authentication, typically
-"host", "http", or "ipp". CUPS adds the remote hostname
-("name@server.example.com") for you. The default name is
-"http".
-<p style="margin-left: 5.0em; text-indent: -5.0em">ServerName hostname-or-ip-address[:port]
-<br>
-<p style="margin-left: 5.0em; text-indent: -5.0em">ServerName /domain/socket
-<br>
-<br>
-Specifies the address and optionally the port to use when connecting to the
-server. <b>Note: Not supported on OS X 10.7 or later.</b>
-<p style="margin-left: 5.0em; text-indent: -5.0em">ServerName hostname-or-ip-address[:port]/version=1.1
-<br>
-<br>
-Specifies the address and optionally the port to use when connecting to a
-server running CUPS 1.3.12 and earlier. <b>Note: Not supported on OS X 10.7 or
-later.</b>
-<p style="margin-left: 5.0em; text-indent: -5.0em">User name
-<br>
-<br>
-Specifies the default user name to use for requests.
+The <b>client.conf</b> file configures the CUPS client and is normally located in the <i>/etc/cups</i> and/or <i>~/.cups</i> directories.
+Each line in the file can be a configuration directive, a blank line, or a comment. Comment lines start with the # character.
+<p><b>Note:</b> Starting with macOS 10.7, this file is only used by command-line and X11 applications plus the IPP backend.
+The <b>ServerName</b> directive is not supported on macOS at all.
+Starting with macOS 10.12, all applications can access these settings in the <i>/Library/Preferences/org.cups.PrintingPrefs.plist</i> file instead.
+See the NOTES section below for more information.
+<h3><a name="DIRECTIVES">Directives</a></h3>
+The following directives are understood by the client. Consult the online help for detailed descriptions:
+<dl class="man">
+<dt><a name="AllowAnyRoot"></a><b>AllowAnyRoot Yes</b>
+<dd style="margin-left: 5.0em"><dt><b>AllowAnyRoot No</b>
+<dd style="margin-left: 5.0em">Specifies whether to allow TLS with certificates that have not been signed by a trusted Certificate Authority.
+The default is "Yes".
+<dt><a name="AllowExpiredCerts"></a><b>AllowExpiredCerts Yes</b>
+<dd style="margin-left: 5.0em"><dt><b>AllowExpiredCerts No</b>
+<dd style="margin-left: 5.0em">Specifies whether to allow TLS with expired certificates.
+The default is "No".
+<dt><a name="DigestOptions"></a><b>DigestOptions DenyMD5</b>
+<dd style="margin-left: 5.0em"><dt><b>DigestOptions None</b>
+<dd style="margin-left: 5.0em">Specifies HTTP Digest authentication options.
+<b>DenyMD5</b> disables support for the original MD5 hash algorithm.
+<dt><a name="Encryption"></a><b>Encryption IfRequested</b>
+<dd style="margin-left: 5.0em"><dt><b>Encryption Never</b>
+<dd style="margin-left: 5.0em"><dt><b>Encryption Required</b>
+<dd style="margin-left: 5.0em">Specifies the level of encryption that should be used.
+<dt><a name="GSSServiceName"></a><b>GSSServiceName </b><i>name</i>
+<dd style="margin-left: 5.0em">Specifies the Kerberos service name that is used for authentication, typically "host", "http", or "ipp".
+CUPS adds the remote hostname ("name@server.example.com") for you. The default name is "http".
+<dt><a name="ServerName"></a><b>ServerName </b><i>hostname-or-ip-address</i>[<i>:port</i>]
+<dd style="margin-left: 5.0em"><dt><b>ServerName </b><i>/domain/socket</i>
+<dd style="margin-left: 5.0em">Specifies the address and optionally the port to use when connecting to the server.
+<b>Note: This directive is not supported on macOS 10.7 or later.</b>
+<dt><b>ServerName </b><i>hostname-or-ip-address</i>[<i>:port</i>]<b>/version=1.1</b>
+<dd style="margin-left: 5.0em">Specifies the address and optionally the port to use when connecting to a server running CUPS 1.3.12 and earlier.
+<dt><a name="SSLOptions"></a><b>SSLOptions </b>[<i>AllowDH</i>] [<i>AllowRC4</i>] [<i>AllowSSL3</i>] [<i>DenyCBC</i>] [<i>DenyTLS1.0</i>] [<i>MaxTLS1.0</i>] [<i>MaxTLS1.1</i>] [<i>MaxTLS1.2</i>] [<i>MaxTLS1.3</i>] [<i>MinTLS1.0</i>] [<i>MinTLS1.1</i>] [<i>MinTLS1.2</i>] [<i>MinTLS1.3</i>]
+<dd style="margin-left: 5.0em"><dt><b>SSLOptions None</b>
+<dd style="margin-left: 5.0em">Sets encryption options (only in /etc/cups/client.conf).
+By default, CUPS only supports encryption using TLS v1.0 or higher using known secure cipher suites.
+Security is reduced when <i>Allow</i> options are used.
+Security is enhanced when <i>Deny</i> options are used.
+The <i>AllowDH</i> option enables cipher suites using plain Diffie-Hellman key negotiation (not supported on systems using GNU TLS).
+The <i>AllowRC4</i> option enables the 128-bit RC4 cipher suites, which are required for some older clients.
+The <i>AllowSSL3</i> option enables SSL v3.0, which is required for some older clients that do not support TLS v1.0.
+The <i>DenyCBC</i> option disables all CBC cipher suites.
+The <i>DenyTLS1.0</i> option disables TLS v1.0 support - this sets the minimum protocol version to TLS v1.1.
+The <i>MinTLS</i> options set the minimum TLS version to support.
+The <i>MaxTLS</i> options set the maximum TLS version to support.
+Not all operating systems support TLS 1.3 at this time.
+<dt><a name="TrustOnFirstUse"></a><b>TrustOnFirstUse Yes</b>
+<dd style="margin-left: 5.0em"><dt><b>TrustOnFirstUse No</b>
+<dd style="margin-left: 5.0em">Specifies whether to trust new TLS certificates by default.
+The default is "Yes".
+<dt><a name="User"></a><b>User </b><i>name</i>
+<dd style="margin-left: 5.0em">Specifies the default user name to use for requests.
+<dt><a name="UserAgentTokens"></a><b>UserAgentTokens None</b>
+<dd style="margin-left: 5.0em"><dt><b>UserAgentTokens ProductOnly</b>
+<dd style="margin-left: 5.0em"><dt><b>UserAgentTokens Major</b>
+<dd style="margin-left: 5.0em"><dt><b>UserAgentTokens Minor</b>
+<dd style="margin-left: 5.0em"><dt><b>UserAgentTokens Minimal</b>
+<dd style="margin-left: 5.0em"><dt><b>UserAgentTokens OS</b>
+<dd style="margin-left: 5.0em"><dt><b>UserAgentTokens Full</b>
+<dd style="margin-left: 5.0em">Specifies what information is included in the User-Agent header of HTTP requests.
+"None" disables the User-Agent header.
+"ProductOnly" reports "CUPS".
+"Major" reports "CUPS/major IPP/2".
+"Minor" reports "CUPS/major.minor IPP/2.1".
+"Minimal" reports "CUPS/major.minor.patch IPP/2.1".
+"OS" reports "CUPS/major.minor.path (osname osversion) IPP/2.1".
+"Full" reports "CUPS/major.minor.path (osname osversion; architecture) IPP/2.1".
+The default is "Minimal".
+<dt><a name="ValidateCerts"></a><b>ValidateCerts Yes</b>
+<dd style="margin-left: 5.0em"><dt><b>ValidateCerts No</b>
+<dd style="margin-left: 5.0em">Specifies whether to only allow TLS with certificates whose common name matches the hostname.
+The default is "No".
+</dl>
+<h2 class="title"><a name="NOTES">Notes</a></h2>
+The <b>client.conf</b> file is deprecated on macOS and will no longer be supported in a future version of CUPS.
+Configuration settings can instead be viewed or changed using the
+<b>defaults</b>(1)
+command:
+<pre class="man">
+defaults write /Library/Preferences/org.cups.PrintingPrefs.plist Encryption Required
+defaults write /Library/Preferences/org.cups.PrintingPrefs.plist TrustOnFirstUse -bool NO
+
+defaults read /Library/Preferences/org.cups.PrintingPrefs.plist Encryption
+</pre>
+On Linux and other systems using GNU TLS, the <i>/etc/cups/ssl/site.crl</i> file, if present, provides a list of revoked X.509 certificates and is used when validating certificates.
<h2 class="title"><a name="SEE_ALSO">See Also</a></h2>
-<a href="http://localhost:631/help">http://localhost:631/help</a>
+<b>cups</b>(1),
+<b>default</b>(1),
+CUPS Online Help (<a href="http://localhost:631/help">http://localhost:631/help</a>)
<h2 class="title"><a name="COPYRIGHT">Copyright</a></h2>
-Copyright 2007-2013 by Apple Inc.
+Copyright © 2007-2019 by Apple Inc.
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projects / thirdparty / cups.git / blobdiff