www/nginx: add request limits

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/Api/SettingsController.php

@@ -305,4 +305,60 @@ class SettingsController extends ApiMutableModelControllerBase
     {
         return $this->setBase('security_header', 'security_header', $uuid);
     }
+
+    // access limit zone headers
+    public function searchlimit_zoneAction()
+    {
+        return $this->searchBase('limit_zone',
+            array('description', 'key', 'size', 'rate', 'rate_unit'));
+    }
+
+    public function getlimit_zoneAction($uuid = null)
+    {
+        $this->sessionClose();
+        return $this->getBase('limit_zone', 'limit_zone', $uuid);
+    }
+
+    public function addlimit_zoneAction()
+    {
+        return $this->addBase('limit_zone', 'limit_zone');
+    }
+
+    public function dellimit_zoneAction($uuid)
+    {
+        return $this->delBase('limit_zone', $uuid);
+    }
+
+    public function setlimit_zoneAction($uuid)
+    {
+        return $this->setBase('limit_zone', 'limit_zone', $uuid);
+    }
+
+    // limit_request_connection
+    public function searchlimit_request_connectionAction()
+    {
+        return $this->searchBase('limit_request_connection',
+            array('description', 'limit_zone', 'nodelay', 'burst', 'connection_count'));
+    }
+
+    public function getlimit_request_connectionAction($uuid = null)
+    {
+        $this->sessionClose();
+        return $this->getBase('limit_request_connection', 'limit_request_connection', $uuid);
+    }
+
+    public function addlimit_request_connectionAction()
+    {
+        return $this->addBase('limit_request_connection', 'limit_request_connection');
+    }
+
+    public function dellimit_request_connectionAction($uuid)
+    {
+        return $this->delBase('limit_request_connection', $uuid);
+    }
+
+    public function setlimit_request_connectionAction($uuid)
+    {
+        return $this->setBase('limit_request_connection', 'limit_request_connection', $uuid);
+    }
 }

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/IndexController.php

@@ -54,6 +54,8 @@ class IndexController extends \OPNsense\Base\IndexController
         $this->view->naxsi_rule = $this->getForm("naxsi_rule");
         $this->view->naxsi_custom_policy = $this->getForm("naxsi_custom_policy");
         $this->view->security_headers = $this->getForm("security_headers");
+        $this->view->limit_request_connection = $this->getForm("limit_request_connection");
+        $this->view->limit_zone = $this->getForm("limit_zone");
         $this->view->pick('OPNsense/Nginx/index');
     }
 

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/forms/httpserver.xml

@@ -94,4 +94,11 @@
     <label>Security Header</label>
     <type>dropdown</type>
   </field>
+  <field>
+    <id>httpserver.limit_request_connections</id>
+    <label>Limit Requests</label>
+    <type>select_multiple</type>
+    <style>selectpicker</style>
+    <help>If you choose multiple limits, the strictest will be used.</help>
+  </field>
 </form>

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/forms/limit_request_connection.xml

@@ -0,0 +1,27 @@
+<form>
+  <field>
+    <id>limit_request_connection.description</id>
+    <label>Description</label>
+    <type>text</type>
+  </field>
+  <field>
+    <id>limit_request_connection.limit_zone</id>
+    <label>Limit Zone</label>
+    <type>dropdown</type>
+  </field>
+  <field>
+    <id>limit_request_connection.connection_count</id>
+    <label>Connection Count (Streams Only)</label>
+    <type>text</type>
+  </field>
+  <field>
+    <id>limit_request_connection.burst</id>
+    <label>Burst (HTTP Only)</label>
+    <type>text</type>
+  </field>
+  <field>
+    <id>limit_request_connection.nodelay</id>
+    <label>No Delay (HTTP Only)</label>
+    <type>text</type>
+  </field>
+</form>

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/forms/limit_zone.xml

@@ -0,0 +1,27 @@
+<form>
+  <field>
+    <id>limit_zone.description</id>
+    <label>Description</label>
+    <type>text</type>
+  </field>
+  <field>
+    <id>limit_zone.key</id>
+    <label>Key</label>
+    <type>dropdown</type>
+  </field>
+  <field>
+    <id>limit_zone.size</id>
+    <label>Size (MB)</label>
+    <type>text</type>
+  </field>
+  <field>
+    <id>limit_zone.rate</id>
+    <label>Rate</label>
+    <type>text</type>
+  </field>
+  <field>
+    <id>limit_zone.rate_unit</id>
+    <label>Rate Unit</label>
+    <type>dropdown</type>
+  </field>
+</form>

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/forms/location.xml

@@ -61,6 +61,13 @@
     <style>selectpicker</style>
     <help>Select an upstream to proxy to or connect via FastCGI if chosen.</help>
   </field>
+  <field>
+    <id>location.limit_request_connections</id>
+    <label>Limit Requests</label>
+    <type>select_multiple</type>
+    <style>selectpicker</style>
+    <help>If you choose multiple limits, the strictest will be used.</help>
+  </field>
   <field>
     <id>location.root</id>
     <label>File System Root</label>

www/nginx/src/opnsense/mvc/app/models/OPNsense/Nginx/Nginx.xml

@@ -255,6 +255,18 @@
       <php_override_scriptname type="TextField">
         <Required>N</Required>
       </php_override_scriptname>
+      <limit_request_connections type="ModelRelationField">
+        <Model>
+          <template>
+            <source>OPNsense.Nginx.Nginx</source>
+            <items>limit_request_connection</items>
+            <display>description</display>
+          </template>
+        </Model>
+        <ValidationMessage>Selected limit zone not found</ValidationMessage>
+        <Required>N</Required>
+        <multiple>Y</multiple>
+      </limit_request_connections>
     </location>
 
     <custom_policy type="ArrayField">
@@ -479,6 +491,18 @@
         <Required>N</Required>
         <multiple>N</multiple>
       </security_header>
+      <limit_request_connections type="ModelRelationField">
+        <Model>
+          <template>
+            <source>OPNsense.Nginx.Nginx</source>
+            <items>limit_request_connection</items>
+            <display>description</display>
+          </template>
+        </Model>
+        <ValidationMessage>Selected limit zone not found</ValidationMessage>
+        <Required>N</Required>
+        <multiple>Y</multiple>
+      </limit_request_connections>
     </http_server>
 
     <http_rewrite type="ArrayField">
@@ -835,5 +859,68 @@
         <default>0</default>
       </csp_form_action_none>
     </security_header>
+
+    <limit_zone type="ArrayField">
+      <description type="TextField">
+        <Required>Y</Required>
+      </description>
+      <key type="OptionField">
+        <default>binary_remote_addr</default>
+        <OptionValues>
+          <binary_remote_addr>Remote IP Address</binary_remote_addr>
+        </OptionValues>
+        <Required>Y</Required>
+      </key>
+      <rate_unit type="OptionField">
+        <default>r/s</default>
+        <OptionValues>
+          <val1 value="r/s">Requests Per Second</val1>
+          <val2 value="r/m">Requests Per Minute</val2>
+        </OptionValues>
+        <Required>Y</Required>
+      </rate_unit>
+      <size type="IntegerField">
+        <Required>Y</Required>
+        <default>10</default>
+        <MinimumValue>1</MinimumValue>
+      </size>
+      <rate type="IntegerField">
+        <Required>Y</Required>
+        <default>20</default>
+        <MinimumValue>1</MinimumValue>
+      </rate>
+    </limit_zone>
+
+    <limit_request_connection type="ArrayField">
+      <limit_zone type="ModelRelationField">
+        <Model>
+          <template>
+            <source>OPNsense.Nginx.Nginx</source>
+            <items>limit_zone</items>
+            <display>description</display>
+          </template>
+        </Model>
+        <ValidationMessage>Selected limit zone not found</ValidationMessage>
+        <Required>Y</Required>
+        <multiple>Y</multiple>
+      </limit_zone>
+      <connection_count type="IntegerField">
+        <MinimumValue>1</MinimumValue>
+        <Required>Y</Required>
+        <default>5</default>
+      </connection_count>
+      <burst type="IntegerField">
+        <MinimumValue>1</MinimumValue>
+        <Required>N</Required>
+        <default>20</default>
+      </burst>
+      <nodelay type="BooleanField">
+        <default>1</default>
+        <Required>Y</Required>
+      </nodelay>
+      <description type="TextField">
+        <Required>Y</Required>
+      </description>
+    </limit_request_connection>
   </items>
 </model>

www/nginx/src/opnsense/mvc/app/views/OPNsense/Nginx/index.volt

@@ -97,6 +97,8 @@ $( document ).ready(function() {
     'httprewrite',
     'custompolicy',
     'security_header',
+    'limit_zone',
+    'limit_request_connection',
     'naxsirule'].forEach(function(element) {
         $("#grid-" + element).UIBootgrid(
             { 'search':'/api/nginx/settings/search' + element,
@@ -118,10 +120,14 @@ $( document ).ready(function() {
 <ul class="nav nav-tabs" role="tablist" id="maintabs">
     {{ partial("layout_partials/base_tabs_header",['formData':settings]) }}
     <li role="presentation" class="dropdown">
-        <a data-toggle="dropdown" href="#" class="dropdown-toggle pull-right visible-lg-inline-block visible-md-inline-block visible-xs-inline-block visible-sm-inline-block" role="button">
+        <a data-toggle="dropdown" href="#"
+           class="dropdown-toggle pull-right visible-lg-inline-block visible-md-inline-block visible-xs-inline-block visible-sm-inline-block"
+           role="button">
             <b><span class="caret"></span></b>
         </a>
-        <a data-toggle="tab" onclick="$('#subtab_item_nginx-http-location').click();" class="visible-lg-inline-block visible-md-inline-block visible-xs-inline-block visible-sm-inline-block" style="border-right:0px;"><b>{{ lang._('HTTP(S)')}}</b></a>
+        <a data-toggle="tab" onclick="$('#subtab_item_nginx-http-location').click();"
+           class="visible-lg-inline-block visible-md-inline-block visible-xs-inline-block visible-sm-inline-block"
+           style="border-right:0px;"><b>{{ lang._('HTTP(S)')}}</b></a>
         <ul class="dropdown-menu" role="menu">
             <li>
                 <a data-toggle="tab" id="subtab_item_nginx-http-location" href="#subtab_nginx-http-location">{{ lang._('Location')}}</a>
@@ -155,6 +161,25 @@ $( document ).ready(function() {
             </li>
         </ul>
     </li>
+    <li role="presentation" class="dropdown">
+        <a data-toggle="dropdown"
+           href="#"
+           class="dropdown-toggle pull-right visible-lg-inline-block visible-md-inline-block visible-xs-inline-block visible-sm-inline-block"
+           role="button">
+            <b><span class="caret"></span></b>
+        </a>
+        <a data-toggle="tab" onclick="$('#subtab_item_nginx-access-request-limit').click();"
+           class="visible-lg-inline-block visible-md-inline-block visible-xs-inline-block visible-sm-inline-block"
+           style="border-right:0px;"><b>{{ lang._('Access')}}</b></a>
+        <ul class="dropdown-menu" role="menu">
+            <li>
+                <a data-toggle="tab" id="subtab_item_nginx-access-request-limit" href="#subtab_nginx-access-request-limit">{{ lang._('Limit Zone')}}</a>
+            </li>
+            <li>
+                <a data-toggle="tab" id="subtab_item_nginx-access-request-limit-connection" href="#subtab_nginx-access-request-limit-connection">{{ lang._('Connection Limits')}}</a>
+            </li>
+        </ul>
+    </li>
 </ul>
 
 <div class="content-box tab-content">
@@ -392,6 +417,56 @@ $( document ).ready(function() {
             </tfoot>
         </table>
     </div>
+    <div id="subtab_nginx-access-request-limit" class="tab-pane fade">
+        <table id="grid-limit_zone" class="table table-condensed table-hover table-striped table-responsive" data-editDialog="limit_zonedlg">
+            <thead>
+                <tr>
+                    <th data-column-id="description" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Description') }}</th>
+                    <th data-column-id="key" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Key') }}</th>
+                    <th data-column-id="size" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Size') }}</th>
+                    <th data-column-id="rate" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Rate') }}</th>
+                    <th data-column-id="rate_unit" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Rate Unit') }}</th>
+                    <th data-column-id="commands" data-width="7em" data-formatter="commands" data-sortable="false">{{ lang._('Commands') }}</th>
+                </tr>
+            </thead>
+            <tbody>
+            </tbody>
+            <tfoot>
+            <tr>
+                <td></td>
+                <td>
+                    <button data-action="add" type="button" class="btn btn-xs btn-default"><span class="fa fa-plus"></span></button>
+                    <button type="button" class="btn btn-xs reload_btn btn-primary"><span class="fa fa-refresh reloadAct_progress"></span></button>
+                </td>
+            </tr>
+            </tfoot>
+        </table>
+    </div>
+    <div id="subtab_nginx-access-request-limit-connection" class="tab-pane fade">
+        <table id="grid-limit_request_connection" class="table table-condensed table-hover table-striped table-responsive" data-editDialog="limit_request_connectiondlg">
+            <thead>
+                <tr>
+                    <th data-column-id="description" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Description') }}</th>
+                    <th data-column-id="limit_zone" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Limit Zone') }}</th>
+                    <th data-column-id="connection_count" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Connection Count') }}</th>
+                    <th data-column-id="burst" data-type="string" data-sortable="true" data-visible="true">{{ lang._('Burst') }}</th>
+                    <th data-column-id="nodelay" data-type="string" data-sortable="true" data-visible="true">{{ lang._('No Delay') }}</th>
+                    <th data-column-id="commands" data-width="7em" data-formatter="commands" data-sortable="false">{{ lang._('Commands') }}</th>
+                </tr>
+            </thead>
+            <tbody>
+            </tbody>
+            <tfoot>
+            <tr>
+                <td></td>
+                <td>
+                    <button data-action="add" type="button" class="btn btn-xs btn-default"><span class="fa fa-plus"></span></button>
+                    <button type="button" class="btn btn-xs reload_btn btn-primary"><span class="fa fa-refresh reloadAct_progress"></span></button>
+                </td>
+            </tr>
+            </tfoot>
+        </table>
+    </div>
 </div>
 
 
@@ -406,3 +481,5 @@ $( document ).ready(function() {
 {{ partial("layout_partials/base_dialog",['fields': naxsi_custom_policy,'id':'custompolicydlg', 'label':lang._('Edit WAF Policy')]) }}
 {{ partial("layout_partials/base_dialog",['fields': naxsi_rule,'id':'naxsiruledlg', 'label':lang._('Edit Naxsi Rule')]) }}
 {{ partial("layout_partials/base_dialog",['fields': security_headers,'id':'security_headersdlg', 'label':lang._('Edit Security Headers')]) }}
+{{ partial("layout_partials/base_dialog",['fields': limit_request_connection,'id':'limit_request_connectiondlg', 'label':lang._('Edit Request Connection Limit')]) }}
+{{ partial("layout_partials/base_dialog",['fields': limit_zone,'id':'limit_zonedlg', 'label':lang._('Edit Limit Zone')]) }}

www/nginx/src/opnsense/service/templates/OPNsense/Nginx/http.conf

@@ -32,6 +32,11 @@ keepalive_timeout {{ OPNsense.Nginx.http.keepalive_timeout }};
 # TODO add when core is ready for allowing nginx to serve the web interface
 # include nginx_web.conf;
 
+
+{% for zone in helpers.toList('OPNsense.Nginx.limit_zone') %}
+limit_req_zone ${{ zone.key }} zone={{ zone['@uuid'].replace('-', '') }}:{{ zone.size }}m rate={{ zone.rate }}{{ zone.rate_unit }};
+{% endfor %}
+
 {% include "OPNsense/Nginx/upstream.conf" ignore missing with context %}
 
 {%   set listen_list = [] %}
@@ -91,6 +96,10 @@ server {
 {%   if security_rule is defined %}
 {%     include "OPNsense/Nginx/security_rule.conf" ignore missing with context %}
 {%   endif %}
+{% endif %}
+{% if server.limit_request_connections is defined %}
+{%   set limit_request = server.limit_request_connections %}
+{%   include "OPNsense/Nginx/httprequestlimit.conf" ignore missing with context %}
 {% endif %}
     # location to ban the host permanently
     set $naxsi_extensive_log {% if server.naxsi_extensive_log is defined and server.naxsi_extensive_log == '1' %}1{% else %}0{% endif %};

www/nginx/src/opnsense/service/templates/OPNsense/Nginx/httprequestlimit.conf

@@ -0,0 +1,12 @@
+{% if limit_request is defined and limit_request != '' %}
+{%   for req in limit_request.split(',') %}
+{%     if helpers.getUUID(req) is defined %}
+{%       set req_data = helpers.getUUID(req) %}
+{%       if helpers.getUUID(req_data.limit_zone) is defined %}
+    limit_req zone={{ req_data.limit_zone.replace('-', '')
+    }}{% if req_data.burst is defined and req_data.burst != '' %} burst={{ req_data.burst
+    }}{% if req_data.nodelay is defined and req_data.nodelay == '1' %} nodelay{% endif %}{% endif %};
+{%       endif %}
+{%     endif %}
+{%   endfor %}
+{% endif %}

www/nginx/src/opnsense/service/templates/OPNsense/Nginx/location.conf

@@ -47,6 +47,10 @@ location {{ location.matchtype }} {{ location.urlpattern }} {
 {% else %}
     autoindex off;
 {% endif %}
+{% if location.limit_request_connections is defined %}
+{%   set limit_request = location.limit_request_connections %}
+{%   include "OPNsense/Nginx/httprequestlimit.conf" ignore missing with context %}
+{% endif %}
 {% if location.authbasic is defined and location.authbasicuserfile is defined %}
     auth_basic "{{location.authbasic}}";
     auth_basic_user_file /var/db/nginx/auth/{{ location.authbasicuserfile }};