diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index b5b6c5bd0..4352de732 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1360,7 +1360,7 @@ module ApplicationHelper
                               :id => wiki_page_id, :version => nil, :anchor => anchor, :parent => parent)
                   end
                 end
-          link_to(title.present? ? title.html_safe : h(page), url, :class => ('wiki-page' + (wiki_page ? '' : ' new')))
+          link_to(title.present? ? title.html_safe : h(page), User.current.logged? ? url : signin_url_without_domain, :class => ('wiki-page' + (wiki_page ? '' : ' new')))
         else
           # project or wiki doesn't exist
           all
@@ -2881,7 +2881,7 @@ module ApplicationHelper
 
   def file_preview_eye(file, html_options={})
     if %w(pdf pptx doc docx xls xlsx).any?{|x| file.filename.downcase.end_with?(x)}
-      link_to '', download_named_attachment_path(file.id, file.filename, preview: true),html_options
+      link_to '', User.current.logged? ? download_named_attachment_path(file.id, file.filename, preview: true) : signin_url_without_domain, html_options
     end
   end
 
diff --git a/app/helpers/courses_helper.rb b/app/helpers/courses_helper.rb
index 8f0d10634..4308fd816 100644
--- a/app/helpers/courses_helper.rb
+++ b/app/helpers/courses_helper.rb
@@ -803,7 +803,11 @@ module CoursesHelper
         link = link_to(text, url, :remote => true, :method => method, :id => "#{course.id}", :class => "sy_btn_grey fl")
       end
     else
-      link = "<a href='javascript:void(0)' class='sy_btn_grey fl ml10' >#{l(:label_course_join_student)}</a>"
+      if User.current.logged?
+        link = "<a href='javascript:void(0)' class='sy_btn_grey fl ml10' >#{l(:label_course_join_student)}</a>"
+      else
+        link = link_to(l(:label_course_join_student), signin_url_without_domain, :class => "sy_btn_grey fl ml10")
+      end
     end
     link.html_safe
   end
diff --git a/app/views/attachments/_project_file_links.html.erb b/app/views/attachments/_project_file_links.html.erb
index 4d261c5d1..82544544a 100644
--- a/app/views/attachments/_project_file_links.html.erb
+++ b/app/views/attachments/_project_file_links.html.erb
@@ -35,9 +35,17 @@
         <% end%>
         <span title="<%= attachment.filename %>" id = "attachment_">
         <% if options[:length] %>
-          <%= link_to_short_attachment attachment, :class => ' link_file_board', :download => true,:length => options[:length] -%>
+              <% if User.current.logged? %>
+                 <%= link_to_short_attachment attachment, :class => ' link_file_board', :download => true,:length => options[:length] -%>
+              <% else %>
+                <%= link_to(attachment.filename, signin_url_without_domain, :class => "link_file_board", :length => options[:length]) %>
+              <% end %>
         <% else %>
-          <%= link_to_short_attachment attachment, :length=> 58,:class => 'hidden link_file_a fl newsBlue mw400', :download => true -%>
+              <% if User.current.logged? %>
+                <%= link_to_short_attachment attachment, :length=> 58,:class => 'hidden link_file_a fl newsBlue mw400', :download => true -%>
+              <% else %>
+                <%= link_to(attachment.filename, signin_url_without_domain,:length=> 58, :class => "hidden link_file_a fl newsBlue mw400") %>
+              <% end %>
         <% end %>
       </span>
         <%if is_float%>
@@ -92,7 +100,7 @@
       <% end %>
       <% if options[:author] %>
     <span class="author" title="<%= attachment.author.show_name%>">
-      <%= link_to h(truncate(attachment.author.show_name, length: 10, omission: '...')),user_path(attachment.author),:class => "link-blue" %>,
+      <%= link_to h(truncate(attachment.author.show_name, length: 10, omission: '...')), User.current.logged? ? user_path(attachment.author) : signin_url_without_domain, :class => "link-blue" %>,
       <%= format_time(attachment.created_on) %>
     </span>
       <% end %>
diff --git a/app/views/files/_project_list.html.erb b/app/views/files/_project_list.html.erb
index faf254015..f03114d69 100644
--- a/app/views/files/_project_list.html.erb
+++ b/app/views/files/_project_list.html.erb
@@ -11,15 +11,15 @@
                 <%# 如果有历史版本则提供历史版本下载 %>
                 <% if file.attachment_histories.count == 0 %>
                     <%= link_to truncate(file.filename,length: 35, omission: '...'),
-                                download_named_attachment_path(file.id, file.filename),
+                                User.current.logged? ? download_named_attachment_path(file.id, file.filename) : signin_url_without_domain,
                                 :title => file.filename+"\n"+file.description.to_s, :style => "overflow: hidden; white-space: nowrap;text-overflow: ellipsis;",:class => "linkGrey3 f_14"  %>
                 <% else %>
-                    <%= link_to truncate(file.filename,length: 35, omission: '...'), attachment_history_download_path(file.id),
+                    <%= link_to truncate(file.filename,length: 35, omission: '...'), User.current.logged? ? attachment_history_download_path(file.id) : signin_url_without_domain,
                                 :title => file.filename+"\n"+file.description.to_s,
                                 :class => "linkGrey3 f_14",
                                 :style => "overflow: hidden; white-space: nowrap;text-overflow: ellipsis;", :remote=>true %>
                 <% end %>
-                <%= file_preview_eye(file, class: 'preview') %>
+                <%=  file_preview_eye(file, class: 'preview') %>
                 <span id="image_private_<%= file.id%>">
                         <% if file.is_public? == false%>
                             <span class="img_private ml5">私有</span>
diff --git a/app/views/layouts/base_courses.html.erb b/app/views/layouts/base_courses.html.erb
index 84aa054e0..49788bc9f 100644
--- a/app/views/layouts/base_courses.html.erb
+++ b/app/views/layouts/base_courses.html.erb
@@ -68,7 +68,7 @@
               <li id="sy_02" class="sy_icons_boards">
                 <% count = @course.boards.first ? (@course.boards.first.topics.count + Message.where("board_id =? and parent_id is not ?", @course.boards.first.id, nil).count) : 0 %>
                 <a href="<%=course_boards_path(@course) %>">讨论区<span><%=count %></span></a>
-                <%= link_to( "",course_boards_path(@course, :flag => true, :is_new => 1), :class => 'sy_class_add', :title =>"#{l(:label_message_new)}") %>
+                <%= link_to( "",course_boards_path(@course, :flag => true, :is_new => 1), :class => 'sy_class_add', :title =>"#{l(:label_message_new)}") if is_teacher %>
               </li>
           <% end %>
           <% unless show_nav?(@course.homework_commons.count) %>
@@ -94,7 +94,7 @@
           <% unless show_nav?(course_feedback_count) %>
               <li id="sy_06" class="sy_icons_feedback">
                 <a href="<%=course_feedback_path(@course) %>">留言<span id="course_jour_count"><%=course_feedback_count %></span></a>
-                <%= link_to "", course_feedback_path(@course), :class => 'sy_class_add', :title =>"#{l(:label_course_feedback)}"%>
+                <%= link_to( "", course_feedback_path(@course), :class => 'sy_class_add', :title =>"#{l(:label_course_feedback)}") if is_teacher %>
               </li>
           <% end %>
           <% unless show_nav?(course_poll_count) %>
@@ -106,7 +106,7 @@
           <% count = User.current.allowed_to?(:as_teacher,@course)? @course.exercises.count : @course.exercises.where("exercise_status <> 1").count %>
           <% unless show_nav?(count) %>
               <li id="sy_08" class="sy_icons_exercise">
-                <a href="<%=exercise_index_path(:course_id => @course.id) %>">在线测验<span><%=count %></span></a>
+                <a href="<%= User.current.logged? ? exercise_index_path(:course_id => @course.id) : signin_url_without_domain %>">在线测验<span><%=count %></span></a>
                 <%= link_to( "", new_exercise_path(:course_id => @course.id), :class => 'sy_class_add', :title =>"新建试卷") if is_teacher %>
               </li>
           <% end %>
diff --git a/app/views/users/_course_boardlist.html.erb b/app/views/users/_course_boardlist.html.erb
index 86b308778..b8a6be169 100644
--- a/app/views/users/_course_boardlist.html.erb
+++ b/app/views/users/_course_boardlist.html.erb
@@ -19,19 +19,19 @@
           <% topics.each do |activity| %>
               <div class="list-file">
                 <div><span class="item_list fl"></span>
-                  <% if activity.parent_id.nil? %> <!--+"(帖子标题)"-->
-                      <%= link_to activity.subject.to_s.html_safe, board_message_path(activity.board_id, activity), :class=> "list-title fl" %>
-                  <% else %>
-                      <%= link_to activity.parent.subject.to_s.html_safe, board_message_path(activity.board_id, activity), :class=> "list-title f1" %>
-                  <% end %>
-                  <% if activity.sticky == 1 %>
-                      <span class="fl ml10 red-cir-btn">顶</span>
-                  <% end%>
-                  <% if activity.locked %>
-                      <span class="fl ml10 green-cir-btn" title="已锁定">锁</span>
-                  <% end %>
-                  <% u = User.where("id=?",activity.author_id).first%>
-                  <div class="cl"></div>
+                   <% if activity.parent_id.nil? %> <!--+"(帖子标题)"-->
+                       <%= link_to activity.subject.to_s.html_safe, User.current.logged? ? board_message_path(activity.board_id, activity) : signin_url_without_domain, :class => "list-title fl" %>
+                   <% else %>
+                       <%= link_to activity.parent.subject.to_s.html_safe, User.current.logged? ? board_message_path(activity.board_id, activity) : signin_url_without_domain, :class => "list-title f1" %>
+                   <% end %>
+                   <% if activity.sticky == 1 %>
+                       <span class="fl ml10 red-cir-btn">顶</span>
+                   <% end%>
+                   <% if activity.locked %>
+                       <span class="fl ml10 green-cir-btn" title="已锁定">锁</span>
+                   <% end %>
+                   <% u = User.where("id=?",activity.author_id).first%>
+                   <div class="cl"></div>
                 </div>
                 <div class="massages-content ml15">
                   <% if activity.parent_id.nil? %>
diff --git a/app/views/users/_course_newslist.html.erb b/app/views/users/_course_newslist.html.erb
index 87dbe6b95..4eb013075 100644
--- a/app/views/users/_course_newslist.html.erb
+++ b/app/views/users/_course_newslist.html.erb
@@ -19,11 +19,11 @@
           <% topics.each do |activity| %>
               <div class="list-file">
                 <div><span class="item_list fl"></span>
-                  <%= link_to activity.title.to_s, news_path(activity), :class => "list-title fl" %>
+                  <%= link_to activity.title.to_s, User.current.logged? ? news_path(activity) : signin_url_without_domain, :class => "list-title fl" %>
                   <% if activity.sticky == 1 %>
                       <span class="fl ml10 red-cir-btn">顶</span>
                   <% end%>
-                  <% u = User.where("id=?",activity.author_id).first%>
+                  <% u = User.where("id=?", activity.author_id).first %>
                   <div class="cl"></div>
                 </div>
                 <div class="massages-content ml15">
diff --git a/app/views/users/_project_boardlist.html.erb b/app/views/users/_project_boardlist.html.erb
index 3ba0244d9..fdffc052d 100644
--- a/app/views/users/_project_boardlist.html.erb
+++ b/app/views/users/_project_boardlist.html.erb
@@ -20,9 +20,9 @@
               <div class="list-file">
                 <div><span class="item_list fl"></span>
                   <% if activity.parent_id.nil? %> <!--+"(帖子标题)"-->
-                      <%= link_to activity.subject.to_s.html_safe, board_message_path(activity.board_id, activity), :class=> "list-title fl" %>
+                      <%= link_to activity.subject.to_s.html_safe,  User.current.logged? ? board_message_path(activity.board_id, activity) : signin_url_without_domain, :class=> "list-title fl" %>
                   <% else %>
-                      <%= link_to activity.parent.subject.to_s.html_safe, board_message_path(activity.board_id, activity), :class=> "list-title f1" %>
+                      <%= link_to activity.parent.subject.to_s.html_safe, User.current.logged? ? board_message_path(activity.board_id, activity) : signin_url_without_domain, :class=> "list-title f1" %>
                   <% end %>
                   <% if activity.sticky == 1 %>
                       <span class="fl ml10 red-cir-btn">顶</span>