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WEB-INF/web.xml

The web.xml should have

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
         http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
         version="2.4">

  <!--  servlets and mappings and normal web.xml stuff here -->

    <security-constraint>
        <web-resource-collection>
            <web-resource-name>Protected</web-resource-name>
            <url-pattern>/protected/*</url-pattern>
            <http-method>GET</http-method>
            <http-method>POST</http-method>
        </web-resource-collection>
        <auth-constraint>
            <role-name>admin</role-name>
        </auth-constraint>
    </security-constraint>
    <login-config>
        <auth-method>FORM</auth-method>
        <realm-name>This is not used for FORM login</realm-name>
        <form-login-config>
            <form-login-page>/login.jsp</form-login-page>
            <form-error-page>/loginerror.jsp</form-error-page>
      </form-login-config>
    </login-config>
    <security-role>
        <role-name>admin</role-name>
    </security-role>
</web-app>

WEB-INF/geronimo-web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app
    xmlns="http://geronimo.apache.org/xml/ns/j2ee/web-1.1">
    <environment>
        <moduleId>
            <artifactId>MyWebApp</artifactId>
        </moduleId>
    </environment>

    <context-root>/MyWebApp</context-root>

    <security-realm-name>${realm.name}</security-realm-name>
    <security>
        <default-principal>
            <principal name="anonymous"
class="org.apache.geronimo.security.realm.providers.GeronimoUserPrincipal"
            />
        </default-principal>
        <role-mappings>
            <role role-name="admin">
                <principal name="administrators" designated-run-as="true"
class="org.apache.geronimo.security.realm.providers.GeronimoGroupPrincipal"
                />
                <principal name="root"
class="org.apache.geronimo.security.realm.providers.GeronimoUserPrincipal"
                />
            </role>
        </role-mappings>
    </security>
</web-app>


">