Author: markt
Date: Thu May 24 19:41:06 2018
New Revision: 1832193
URL: http://svn.apache.org/viewvc?rev=1832193&view=rev
Log:
Add the RemoteCIDRFilter and RemoteCIDRValve that can be used to allow/deny
requests based on IPv4 and/or IPv6 client address where the IP ranges are
defined using CIDR notation.
Based on a patch by Francis Galiegue.
Added:
tomcat/trunk/java/org/apache/catalina/filters/RemoteCIDRFilter.java (with
props)
tomcat/trunk/java/org/apache/catalina/valves/RemoteCIDRValve.java (with
props)
Modified:
tomcat/trunk/java/org/apache/catalina/filters/LocalStrings.properties
tomcat/trunk/java/org/apache/catalina/valves/LocalStrings.properties
tomcat/trunk/webapps/docs/changelog.xml
tomcat/trunk/webapps/docs/config/filter.xml
tomcat/trunk/webapps/docs/config/valve.xml
Modified: tomcat/trunk/java/org/apache/catalina/filters/LocalStrings.properties
URL:
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/filters/LocalStrings.properties?rev=1832193&r1=1832192&r2=1832193&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/filters/LocalStrings.properties
(original)
+++ tomcat/trunk/java/org/apache/catalina/filters/LocalStrings.properties Thu
May 24 19:41:06 2018
@@ -49,6 +49,9 @@ expiresFilter.invalidDurationUnit=Invali
httpHeaderSecurityFilter.committed=Unable to add HTTP headers since response
is already committed on entry to the HTTP header security Filter
httpHeaderSecurityFilter.clickjack.invalid=An invalid value [{0}] was
specified for the anti click-jacking header
+remoteCidrFilter.invalid=Invalid configuration provided for [{0}]. See
previous messages for details.
+remoteCidrFilter.noRemoteIp=Client does not have an IP address. Request denied.
+
requestFilter.deny=Denied request for [{0}] based on property [{1}]
restCsrfPreventionFilter.invalidNonce=CSRF nonce validation failed
\ No newline at end of file
Added: tomcat/trunk/java/org/apache/catalina/filters/RemoteCIDRFilter.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/filters/RemoteCIDRFilter.java?rev=1832193&view=auto
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/filters/RemoteCIDRFilter.java (added)
+++ tomcat/trunk/java/org/apache/catalina/filters/RemoteCIDRFilter.java Thu May
24 19:41:06 2018
@@ -0,0 +1,236 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.catalina.filters;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.catalina.util.NetMask;
+import org.apache.juli.logging.Log;
+import org.apache.juli.logging.LogFactory;
+
+public final class RemoteCIDRFilter extends FilterBase {
+
+ /**
+ * text/plain MIME type: this is the MIME type we return when a
+ * {@link ServletResponse} is not an {@link HttpServletResponse}
+ */
+ private static final String PLAIN_TEXT_MIME_TYPE = "text/plain";
+
+ /**
+ * Our logger
+ */
+ private final Log log = LogFactory.getLog(RemoteCIDRFilter.class);
+
+ /**
+ * The list of allowed {@link NetMask}s
+ */
+ private final List<NetMask> allow = new ArrayList<>();
+
+ /**
+ * The list of denied {@link NetMask}s
+ */
+ private final List<NetMask> deny = new ArrayList<>();
+
+
+ /**
+ * Return a string representation of the {@link NetMask} list in #allow.
+ *
+ * @return the #allow list as a string, without the leading '[' and
trailing
+ * ']'
+ */
+ public String getAllow() {
+ return allow.toString().replace("[", "").replace("]", "");
+ }
+
+
+ /**
+ * Fill the #allow list with the list of netmasks provided as an argument,
+ * if any. Calls #fillFromInput.
+ *
+ * @param input The list of netmasks, as a comma separated string
+ * @throws IllegalArgumentException One or more netmasks are invalid
+ */
+ public void setAllow(final String input) {
+ final List<String> messages = fillFromInput(input, allow);
+
+ if (messages.isEmpty()) {
+ return;
+ }
+
+ for (final String message : messages) {
+ log.error(message);
+ }
+
+ throw new
IllegalArgumentException(sm.getString("remoteCidrFilter.invalid", "allow"));
+ }
+
+
+ /**
+ * Return a string representation of the {@link NetMask} list in #deny.
+ *
+ * @return the #deny list as string, without the leading '[' and trailing
+ * ']'
+ */
+ public String getDeny() {
+ return deny.toString().replace("[", "").replace("]", "");
+ }
+
+
+ /**
+ * Fill the #deny list with the list of netmasks provided as an argument,
if
+ * any. Calls #fillFromInput.
+ *
+ * @param input The list of netmasks, as a comma separated string
+ * @throws IllegalArgumentException One or more netmasks are invalid
+ */
+ public void setDeny(final String input) {
+ final List<String> messages = fillFromInput(input, deny);
+
+ if (messages.isEmpty())
+ return;
+
+ for (final String message : messages) {
+ log.error(message);
+ }
+
+ throw new
IllegalArgumentException(sm.getString("remoteCidrFilter.invalid", "deny"));
+ }
+
+
+
+ @Override
+ protected boolean isConfigProblemFatal() {
+ // Failure to configure a security related component should always be
+ // fatal.
+ return true;
+ }
+
+
+ @Override
+ public void doFilter(final ServletRequest request, final ServletResponse
response, final FilterChain chain)
+ throws IOException, ServletException {
+
+ if (isAllowed(request.getRemoteAddr())) {
+ chain.doFilter(request, response);
+ return;
+ }
+
+ if (!(response instanceof HttpServletResponse)) {
+ sendErrorWhenNotHttp(response);
+ return;
+ }
+
+ ((HttpServletResponse)
response).sendError(HttpServletResponse.SC_FORBIDDEN);
+ }
+
+
+ @Override
+ public Log getLogger() {
+ return log;
+ }
+
+
+ /**
+ * Test if a remote's IP address is allowed to proceed.
+ *
+ * @param property The remote's IP address, as a string
+ * @return true if allowed
+ */
+ private boolean isAllowed(final String property) {
+ final InetAddress addr;
+
+ try {
+ addr = InetAddress.getByName(property);
+ } catch (UnknownHostException e) {
+ // This should be in the 'could never happen' category but handle
it
+ // to be safe.
+ log.error(sm.getString("remoteCidrFilter.noRemoteIp"), e);
+ return false;
+ }
+
+ for (final NetMask nm : deny) {
+ if (nm.matches(addr)) {
+ return false;
+ }
+ }
+
+ for (final NetMask nm : allow) {
+ if (nm.matches(addr)) {
+ return true;
+ }
+ }
+
+ // Allow if deny is specified but allow isn't
+ if (!deny.isEmpty() && allow.isEmpty()) {
+ return true;
+ }
+
+ // Deny this request
+ return false;
+ }
+
+
+ private void sendErrorWhenNotHttp(ServletResponse response) throws
IOException {
+ final PrintWriter writer = response.getWriter();
+ response.setContentType(PLAIN_TEXT_MIME_TYPE);
+ writer.write(sm.getString("http.403"));
+ writer.flush();
+ }
+
+
+ /**
+ * Fill a {@link NetMask} list from a string input containing a
+ * comma-separated list of (hopefully valid) {@link NetMask}s.
+ *
+ * @param input The input string
+ * @param target The list to fill
+ * @return a string list of processing errors (empty when no errors)
+ */
+ private List<String> fillFromInput(final String input, final List<NetMask>
target) {
+ target.clear();
+ if (input == null || input.isEmpty()) {
+ return Collections.emptyList();
+ }
+
+ final List<String> messages = new LinkedList<>();
+ NetMask nm;
+
+ for (final String s : input.split("\\s*,\\s*")) {
+ try {
+ nm = new NetMask(s);
+ target.add(nm);
+ } catch (IllegalArgumentException e) {
+ messages.add(s + ": " + e.getMessage());
+ }
+ }
+
+ return Collections.unmodifiableList(messages);
+ }
+}
Propchange: tomcat/trunk/java/org/apache/catalina/filters/RemoteCIDRFilter.java
------------------------------------------------------------------------------
svn:eol-style = native
Modified: tomcat/trunk/java/org/apache/catalina/valves/LocalStrings.properties
URL:
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/valves/LocalStrings.properties?rev=1832193&r1=1832192&r2=1832193&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/valves/LocalStrings.properties
(original)
+++ tomcat/trunk/java/org/apache/catalina/valves/LocalStrings.properties Thu
May 24 19:41:06 2018
@@ -47,6 +47,9 @@ errorReportValve.noDescription=No descri
errorReportValve.errorPageIOException=Unable to display error page at [{0}]
due to an exception
errorReportValve.errorPageNotFound=Unable to find a static error page at [{0}]
+remoteCidrValve.invalid=Invalid configuration provided for [{0}]. See previous
messages for details.
+remoteCidrValve.noRemoteIp=Client does not have an IP address. Request denied.
+
# Remote IP valve
remoteIpValve.invalidPortHeader=Invalid value [{0}] found for port in HTTP
header [{1}]
Added: tomcat/trunk/java/org/apache/catalina/valves/RemoteCIDRValve.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/valves/RemoteCIDRValve.java?rev=1832193&view=auto
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/valves/RemoteCIDRValve.java (added)
+++ tomcat/trunk/java/org/apache/catalina/valves/RemoteCIDRValve.java Thu May
24 19:41:06 2018
@@ -0,0 +1,199 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.catalina.valves;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.catalina.connector.Request;
+import org.apache.catalina.connector.Response;
+import org.apache.catalina.util.NetMask;
+import org.apache.juli.logging.Log;
+import org.apache.juli.logging.LogFactory;
+
+public final class RemoteCIDRValve extends ValveBase {
+
+ /**
+ * Our logger
+ */
+ private static final Log log = LogFactory.getLog(RemoteCIDRValve.class);
+
+ /**
+ * The list of allowed {@link NetMask}s
+ */
+ private final List<NetMask> allow = new ArrayList<>();
+
+ /**
+ * The list of denied {@link NetMask}s
+ */
+ private final List<NetMask> deny = new ArrayList<>();
+
+
+ public RemoteCIDRValve() {
+ super(true);
+ }
+
+
+ /**
+ * Return a string representation of the {@link NetMask} list in #allow.
+ *
+ * @return the #allow list as a string, without the leading '[' and
trailing
+ * ']'
+ */
+ public String getAllow() {
+ return allow.toString().replace("[", "").replace("]", "");
+ }
+
+
+ /**
+ * Fill the #allow list with the list of netmasks provided as an argument,
+ * if any. Calls #fillFromInput.
+ *
+ * @param input The list of netmasks, as a comma separated string
+ * @throws IllegalArgumentException One or more netmasks are invalid
+ */
+ public void setAllow(final String input) {
+ final List<String> messages = fillFromInput(input, allow);
+
+ if (messages.isEmpty()) {
+ return;
+ }
+
+ for (final String message : messages) {
+ log.error(message);
+ }
+
+ throw new
IllegalArgumentException(sm.getString("remoteCidrValve.invalid", "allow"));
+ }
+
+
+ /**
+ * Return a string representation of the {@link NetMask} list in #deny.
+ *
+ * @return the #deny list as a string, without the leading '[' and trailing
+ * ']'
+ */
+ public String getDeny() {
+ return deny.toString().replace("[", "").replace("]", "");
+ }
+
+
+ /**
+ * Fill the #deny list with the list of netmasks provided as an argument,
if
+ * any. Calls #fillFromInput.
+ *
+ * @param input The list of netmasks, as a comma separated string
+ * @throws IllegalArgumentException One or more netmasks are invalid
+ */
+
+ public void setDeny(final String input) {
+ final List<String> messages = fillFromInput(input, deny);
+
+ if (messages.isEmpty()) {
+ return;
+ }
+
+ for (final String message : messages) {
+ log.error(message);
+ }
+
+ throw new
IllegalArgumentException(sm.getString("remoteCidrValve.invalid", "deny"));
+ }
+
+
+ @Override
+ public void invoke(final Request request, final Response response) throws
IOException, ServletException {
+
+ if (isAllowed(request.getRequest().getRemoteAddr())) {
+ getNext().invoke(request, response);
+ } else {
+ response.sendError(HttpServletResponse.SC_FORBIDDEN);
+ }
+ }
+
+ private boolean isAllowed(final String property) {
+ final InetAddress addr;
+
+ try {
+ addr = InetAddress.getByName(property);
+ } catch (UnknownHostException e) {
+ // This should be in the 'could never happen' category but handle
it
+ // to be safe.
+ log.error(sm.getString("remoteCidrValve.noRemoteIp"), e);
+ return false;
+ }
+
+ for (final NetMask nm : deny) {
+ if (nm.matches(addr)) {
+ return false;
+ }
+ }
+
+ for (final NetMask nm : allow) {
+ if (nm.matches(addr)) {
+ return true;
+ }
+ }
+
+ // Allow if deny is specified but allow isn't
+ if (!deny.isEmpty() && allow.isEmpty()) {
+ return true;
+ }
+
+ // Deny this request
+ return false;
+ }
+
+
+ /**
+ * Fill a {@link NetMask} list from a string input containing a
+ * comma-separated list of (hopefully valid) {@link NetMask}s.
+ *
+ * @param input The input string
+ * @param target The list to fill
+ * @return a string list of processing errors (empty when no errors)
+ */
+
+ private List<String> fillFromInput(final String input, final List<NetMask>
target) {
+ target.clear();
+ if (input == null || input.isEmpty()) {
+ return Collections.emptyList();
+ }
+
+ final List<String> messages = new LinkedList<>();
+ NetMask nm;
+
+ for (final String s : input.split("\\s*,\\s*")) {
+ try {
+ nm = new NetMask(s);
+ target.add(nm);
+ } catch (IllegalArgumentException e) {
+ messages.add(s + ": " + e.getMessage());
+ }
+ }
+
+ return Collections.unmodifiableList(messages);
+ }
+}
Propchange: tomcat/trunk/java/org/apache/catalina/valves/RemoteCIDRValve.java
------------------------------------------------------------------------------
svn:eol-style = native
Modified: tomcat/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/trunk/webapps/docs/changelog.xml?rev=1832193&r1=1832192&r2=1832193&view=diff
==============================================================================
--- tomcat/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/trunk/webapps/docs/changelog.xml Thu May 24 19:41:06 2018
@@ -97,6 +97,12 @@
<code>AccessLogValve</code> that causes IPv6 addresses to be output in
canonical form defined by RFC 5952. (ognjen/markt)
</add>
+ <add>
+ <bug>51953</bug>: Add the <code>RemoteCIDRFilter</code> and
+ <code>RemoteCIDRValve</code> that can be used to allow/deny requests
+ based on IPv4 and/or IPv6 client address where the IP ranges are
defined
+ using CIDR notation. Based on a patch by Francis Galiegue. (markt)
+ </add>
<fix>
<bug>62343</bug>: Make CORS filter defaults more secure. This is the
fix
for CVE-2018-8014. (markt)
Modified: tomcat/trunk/webapps/docs/config/filter.xml
URL:
http://svn.apache.org/viewvc/tomcat/trunk/webapps/docs/config/filter.xml?rev=1832193&r1=1832192&r2=1832193&view=diff
==============================================================================
--- tomcat/trunk/webapps/docs/config/filter.xml (original)
+++ tomcat/trunk/webapps/docs/config/filter.xml Thu May 24 19:41:06 2018
@@ -1100,6 +1100,108 @@ FINE: Request "/docs/config/manager.html
</section>
+<section name="Remote CIDR Filter">
+
+ <subsection name="Introduction">
+
+ <p>The <strong>Remote CIDR Filter</strong> allows you to compare the
+ IP address of the client that submitted this request against one or more
+ netmasks following the CIDR notation, and either allow the request to
+ continue or refuse to process the request from this client. IPv4 and
+ IPv6 are both fully supported.
+ </p>
+
+ <p>This filter mimicks Apache httpd's <code>Order</code>,
+ <code>Allow from</code> and <code>Deny from</code> directives,
+ with the following limitations:
+ </p>
+
+ <ul>
+ <li><code>Order</code> will always be <code>allow, deny</code>;</li>
+ <li>dotted quad notations for netmasks are not supported (that is, you
+ cannot write <code>192.168.1.0/255.255.255.0</code>, you must write
+ <code>192.168.1.0/24</code>;
+ </li>
+ <li>shortcuts, like <code>10.10.</code>, which is equivalent to
+ <code>10.10.0.0/16</code>, are not supported;
+ </li>
+ <li>as the filter name says, this is a CIDR only filter,
+ therefore subdomain notations like <code>.mydomain.com</code> are not
+ supported either.
+ </li>
+ </ul>
+
+ <p>Some more features of this filter are:
+ </p>
+
+ <ul>
+ <li>if you omit the CIDR prefix, this filter becomes a single IP
+ filter;</li>
+ <li>unlike the <a href="#Remote_Host_Filter">Remote Host Filter</a>,
+ it can handle IPv6 addresses in condensed form (<code>::1</code>,
+ <code>fe80::/71</code>, etc).</li>
+ </ul>
+
+ </subsection>
+
+ <subsection name="Filter Class Name">
+
+ <p>The filter class name for the Remote Address Filter is
+ <strong><code>org.apache.catalina.filters.RemoteCIDRFilter</code>
+ </strong>.</p>
+
+ </subsection>
+
+ <subsection name="Initialisation parameters">
+
+ <p>The <strong>Remote CIDR Filter</strong> supports the following
+ initialisation parameters:</p>
+
+ <attributes>
+
+ <attribute name="allow" required="false">
+ <p>A comma-separated list of IPv4 or IPv6 netmasks or addresses
+ that the remote client's IP address is matched against.
+ If this attribute is specified, the remote address MUST match
+ for this request to be accepted. If this attribute is not specified,
+ all requests will be accepted UNLESS the remote IP is matched by a
+ netmask in the <code>deny</code> attribute.
+ </p>
+ </attribute>
+
+ <attribute name="deny" required="false">
+ <p>A comma-separated list of IPv4 or IPv6 netmasks or addresses
+ that the remote client's IP address is matched against.
+ If this attribute is specified, the remote address MUST NOT match
+ for this request to be accepted. If this attribute is not specified,
+ request acceptance is governed solely by the <code>accept</code>
+ attribute.
+ </p>
+ </attribute>
+
+ </attributes>
+
+ </subsection>
+
+ <subsection name="Example">
+ <p>To allow access only for the clients connecting from localhost:</p>
+ <pre>
+ <filter>
+ <filter-name>Remote CIDR Filter</filter-name>
+
<filter-class>org.apache.catalina.filters.RemoteCIDRFilter</filter-class>
+ <init-param>
+ <param-name>allow</param-name>
+ <param-value>127.0.0.0/8, ::1</param-value>
+ </init-param>
+ </filter>
+ <filter-mapping>
+ <filter-name>Remote CIDR Filter</filter-name>
+ <url-pattern>/*</url-pattern>
+ </filter-mapping>
+ </pre>
+ </subsection>
+
+</section>
<section name="Remote IP Filter">
Modified: tomcat/trunk/webapps/docs/config/valve.xml
URL:
http://svn.apache.org/viewvc/tomcat/trunk/webapps/docs/config/valve.xml?rev=1832193&r1=1832192&r2=1832193&view=diff
==============================================================================
--- tomcat/trunk/webapps/docs/config/valve.xml (original)
+++ tomcat/trunk/webapps/docs/config/valve.xml Thu May 24 19:41:06 2018
@@ -647,7 +647,7 @@
header. This is useful in combination with the context attribute
<code>preemptiveAuthentication="true"</code>.</p>
- <p><strong>Note:</strong> This filter processes the value returned by
+ <p><strong>Note:</strong> This valve processes the value returned by
method <code>ServletRequest.getRemoteHost()</code>. To allow the method
to return proper host names, you have to enable "DNS lookups" feature on
a <strong>Connector</strong>.</p>
@@ -718,6 +718,100 @@
</subsection>
+<subsection name="Remote CIDR Valve">
+
+ <subsection name="Introduction">
+
+ <p>The <strong>Remote CIDR Valve</strong> allows you to compare the
+ IP address of the client that submitted this request against one or more
+ netmasks following the CIDR notation, and either allow the request to
+ continue or refuse to process the request from this client. IPv4 and
+ IPv6 are both fully supported. A Remote CIDR Valve can be associated
+ with any Catalina container (<a href="engine.html">Engine</a>,
+ <a href="host.html">Host</a>, or <a href="context.html">Context</a>), and
+ must accept any request presented to this container for processing before
+ it will be passed on.
+ </p>
+
+ <p>This valve mimicks Apache's <code>Order</code>,
+ <code>Allow from</code> and <code>Deny from</code> directives,
+ with the following limitations:
+ </p>
+
+ <ul>
+ <li><code>Order</code> will always be <code>allow, deny</code>;</li>
+ <li>dotted quad notations for netmasks are not supported (that is, you
+ cannot write <code>192.168.1.0/255.255.255.0</code>, you must write
+ <code>192.168.1.0/24</code>;
+ </li>
+ <li>shortcuts, like <code>10.10.</code>, which is equivalent to
+ <code>10.10.0.0/16</code>, are not supported;
+ </li>
+ <li>as the valve name says, this is a CIDR only valve,
+ therefore subdomain notations like <code>.mydomain.com</code> are not
+ supported either.
+ </li>
+ </ul>
+
+ <p>Some more features of this valve are:
+ </p>
+
+ <ul>
+ <li>if you omit the CIDR prefix, this valve becomes a single IP
+ valve;</li>
+ <li>unlike the <a href="#Remote_Host_Valve">Remote Host Valve</a>,
+ it can handle IPv6 addresses in condensed form (<code>::1</code>,
+ <code>fe80::/71</code>, etc).</li>
+ </ul>
+
+ </subsection>
+
+ <subsection name="Attributes">
+
+ <p>The <strong>Remote CIDR Valve</strong> supports the following
+ configuration attributes:</p>
+
+ <attributes>
+
+ <attribute name="className" required="true">
+ <p>Java class name of the implementation to use. This MUST be set to
+ <strong>org.apache.catalina.valves.RemoteCIDRValve</strong>.</p>
+ </attribute>
+
+ <attribute name="allow" required="false">
+ <p>A comma-separated list of IPv4 or IPv6 netmasks or addresses
+ that the remote client's IP address is matched against.
+ If this attribute is specified, the remote address MUST match
+ for this request to be accepted. If this attribute is not specified,
+ all requests will be accepted UNLESS the remote IP is matched by a
+ netmask in the <code>deny</code> attribute.
+ </p>
+ </attribute>
+
+ <attribute name="deny" required="false">
+ <p>A comma-separated list of IPv4 or IPv6 netmasks or addresses
+ that the remote client's IP address is matched against.
+ If this attribute is specified, the remote address MUST NOT match
+ for this request to be accepted. If this attribute is not specified,
+ request acceptance is governed solely by the <code>accept</code>
+ attribute.
+ </p>
+ </attribute>
+
+ </attributes>
+
+ </subsection>
+
+ <subsection name="Example">
+ <p>To allow access only for the clients connecting from localhost:</p>
+ <pre>
+ <Valve className="org.apache.catalina.valves.RemoteCIDRValve"
+ allow="127.0.0.1, ::1"/>
+ </pre>
+ </subsection>
+
+</subsection>
+
</section>
@@ -1014,7 +1108,6 @@
</section>
-
<section name="Single Sign On Valve">
<subsection name="Introduction">
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