403 Access Denied

问题描述

在centos7安装好tomcat后，在客户端远程访问tomcat的时候，出现了这个错误。错误描述：

403 Access Denied

You are not authorized to view this page.

By default the Manager is only accessible from a browser running on the same machine as Tomcat. If you wish to modify this restriction, you'll need to edit the Manager's context.xml file.

If you have already configured the Manager application to allow access and you have used your browsers back button, used a saved book-mark or similar then you may have triggered the cross-site request forgery (CSRF) protection that has been enabled for the HTML interface of the Manager application. You will need to reset this protection by returning to the main Manager page. Once you return to this page, you will be able to continue using the Manager appliction's HTML interface normally. If you continue to see this access denied message, check that you have the necessary permissions to access this application.

If you have not changed any configuration files, please examine the file conf/tomcat-users.xml in your installation. That file must contain the credentials to let you use this webapp.

For example, to add the manager-gui role to a user named tomcat with a password of s3cret, add the following to the config file listed above.

<role rolename="manager-gui"/>
<user username="tomcat" password="s3cret" roles="manager-gui"/>
Note that for Tomcat 7 onwards, the roles required to use the manager application were changed from the single manager role to the following four roles. You will need to assign the role(s) required for the functionality you wish to access.

manager-gui - allows access to the HTML GUI and the status pages
manager-script - allows access to the text interface and the status pages
manager-jmx - allows access to the JMX proxy and the status pages
manager-status - allows access to the status pages only
The HTML interface is protected against CSRF but the text and JMX interfaces are not. To maintain the CSRF protection:

Users with the manager-gui role should not be granted either the manager-script or manager-jmx roles.
If the text or jmx interfaces are accessed through a browser (e.g. for testing since these interfaces are intended for tools not humans) then the browser must be closed afterwards to terminate the session.

本次tomcat版本用的是8.5.9，以之前的版本中，仅需要在CATALINA_HOME/conf/tomcat-user.xml这个文件中配置以下信息即可

<role rolename="manager-gui"/>
<user username="tomcat" password="s3cret" roles="manager-gui"/>

但是8.5.9这个版本配置这些信息后居然还是这样的错误。

解决方案

1. 配置用户角色信息，如下

<role rolename="manager-gui"/>
<user username="tomcat" password="s3cret" roles="manager-gui"/>

1. 修改CATALINA_HOME/webapps/manager/META-INF/context.xml这个文件。

<Context antiResourceLocking="false" privileged="true" >
  <Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
</Context>

将这个文件中的value标签注释掉即可。修改后的配置如下：

<Context antiResourceLocking="false" privileged="true" >
  <!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> --> 
</Context>

之后，重启tomcat服务即可。

参考链接：
http://blog.youkuaiyun.com/guochunyang/article/details/51820066