attached patch fixes a bug https://bugzilla.redhat.com/show_bug.cgi?id=1249455

details are in the commit message.

/ Alexander Bokovoy
From 3e5edd4d8f334c053bf2e216d25b14f40590a7c4 Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <aboko...@redhat.com>
Date: Wed, 5 Aug 2015 21:33:45 +0300
Subject: [PATCH] Fix selector of protocol for LSA RPC binding string

For Windows Server 2012R2 and others which force SMB2 protocol use
we have to specify right DCE RPC binding options.

For using SMB1 protocol we have to omit specifying SMB2 protocol and
anything else or otherwise SMB1 would be considered a pipe to connect
to. This is by design of a binding string format.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1249455

diff --git a/ipaserver/dcerpc.py b/ipaserver/dcerpc.py
index be6313e..f334eef 100644
--- a/ipaserver/dcerpc.py
+++ b/ipaserver/dcerpc.py
@@ -855,8 +855,8 @@ class TrustDomainInstance(object):
         We try NCACN_NP before NCACN_IP_TCP and use SMB2 before SMB1 or 
         transports = (u'ncacn_np', u'ncacn_ip_tcp')
-        options = ( u'smb2', u'smb1', u'')
-        binding_template=lambda x,y,z: u'%s:%s[%s,print]' % (x, y, z)
+        options = ( u'smb2,print', u'print')
+        binding_template=lambda x,y,z: u'%s:%s[%s]' % (x, y, z)
         return [binding_template(t, remote_host, o) for t in transports for o 
in options]
     def retrieve_anonymously(self, remote_host, discover_srv=False, 

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