How is it possible I get this message: HTTP Status 400 - Invalid direct reference to form login page
during JDBC Realm FORM authentication. These are the stpes I followed : 1. create tables in mysql db : create table IsInRole( username varchar(20) not null, userrole varchar(10) not null, primary key(username,userrole) ); create table usertable( username varchar(20) not null, userpwd varchar(10) , .... ... primary key (username) ); 2. in server.xml <Realm className="org.apache.catalina.realm.JDBCRealm" debug="99" driverName="org.gjt.mm.mysql.Driver" connectionURL="jdbc:mysql://localhost/mydb" connectionName="username" connectionPassword="password" userTable="usertable" userNameCol="username" userCredCol="userpwd" userRoleTable="IsInRole" roleNameCol="userrole" /> 3. always in server.xml, commented out : <!-- <Realm className="org.apache.catalina.realm.UserDatabaseRealm" debug="0" resourceName="UserDatabase"/> --> 4. created webapps/logIn/login.jsp with: <form name="form1" method="post" action="j_security_check"> <input name="j_username" type="text" id="login" maxlength="16" size="20" > <input name="j_password" type="password" id="password" maxlength="10" size="20"> <input type="submit" value="log in" name="action"> <input type="reset" value="pulisci" name="action"></p> </form> 5. in web.xml : <security-constraint> <web-resource-collection> <web-resource-name>test</web-resource-name> <url-pattern>/protected/*</url-pattern> <http-method>DELETE</http-method> <http-method>GET</http-method> <http-method>POST</http-method> <http-method>PUT</http-method> </web-resource-collection> <auth-constraint> <role-name>myrole</role-name> </auth-constraint> </security-constraint> <login-config> <auth-method>FORM</auth-method> <realm-name>authentication test</realm-name> <form-login-config> <form-login-page>/logIn/logIn.jsp</form-login-page> <form-error-page>/logIn/logIn-error.jsp</form-error-page> </form-login-config> </login-config> when I try to go to "/protected/index.jsp" I have to pass the login.jsp and when I authenticate I get 400 error code ? what's wrong ? thank you FB