docs-xml: document 'reject md5 servers'

Signed-off-by: Stefan Metzmacher <metze@samba.org>

diff --git a/docs-xml/smbdotconf/winbind/rejectmd5servers.xml b/docs-xml/smbdotconf/winbind/rejectmd5servers.xml
new file mode 100644 (file)
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+++ b/docs-xml/smbdotconf/winbind/rejectmd5servers.xml
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+<samba:parameter name="reject md5 servers"
+                 context="G"
+                 type="boolean"
+                 advanced="1"
+                 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
+<description>
+       <para>This option controls whether winbindd requires support
+       for aes support for the netlogon secure channel.</para>
+
+       <para>The following flags will be required NETLOGON_NEG_ARCFOUR,
+       NETLOGON_NEG_SUPPORTS_AES, NETLOGON_NEG_PASSWORD_SET2 and NETLOGON_NEG_AUTHENTICATED_RPC.</para>
+
+       <para>You can set this to yes if all domain controllers support aes.
+       This will prevent downgrade attacks.</para>
+
+       <para>The behavior can be controlled per netbios domain
+       by using 'reject md5 servers:NETBIOSDOMAIN = yes' as option.</para>
+
+       <para>This option takes precedence to the 'disable aes schannel'
+       and 'require strong key' options.</para>
+</description>
+
+<value type="default">no</value>
+</samba:parameter>