Add admin settings entries

app/controllers/admin/application_settings_controller.rb

@@ -138,6 +138,9 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
       :two_factor_grace_period,
       :user_default_external,
       :user_oauth_applications,
+      :unique_ips_limit_per_user,
+      :unique_ips_limit_time_window,
+      :unique_ips_limit_enabled,
       :version_check_enabled,
       :terminal_max_session_time,
 

app/models/application_setting.rb

@@ -64,6 +64,16 @@ class ApplicationSetting < ActiveRecord::Base
             presence: true,
             if: :akismet_enabled
 
+  validates :unique_ips_limit_per_user,
+            numericality: { greater_than_or_equal_to: 1 },
+            presence: true,
+            if: :unique_ips_limit_enabled
+
+  validates :unique_ips_limit_time_window,
+            numericality: { greater_than_or_equal_to: 0 },
+            presence: true,
+            if: :unique_ips_limit_enabled
+
   validates :koding_url,
             presence: true,
             if: :koding_enabled

app/views/admin/application_settings/_form.html.haml

@@ -360,6 +360,28 @@
           Generate API key at
           %a{ href: 'http://www.akismet.com', target: 'blank' } http://www.akismet.com
 
+    .form-group
+      .col-sm-offset-2.col-sm-10
+        .checkbox
+          = f.label :unique_ips_limit_enabled do
+            = f.check_box :unique_ips_limit_enabled
+            Limit sign in from multiple ips
+          %span.help-block#recaptcha_help_block Helps prevent malicious users hide their activity
+
+    .form-group
+      = f.label :unique_ips_limit_per_user, 'IPs per user', class: 'control-label col-sm-2'
+      .col-sm-10
+        = f.number_field :unique_ips_limit_per_user, class: 'form-control'
+        .help-block
+          Maximum number of unique IPs per user
+
+    .form-group
+      = f.label :unique_ips_limit_time_window, 'IP expiration time', class: 'control-label col-sm-2'
+      .col-sm-10
+        = f.number_field :unique_ips_limit_time_window, class: 'form-control'
+        .help-block
+          How long an IP will be counted towards the limit
+
   %fieldset
     %legend Abuse reports
     .form-group