问题描述

在创建Azure App Service时，服务端的配置使用Java 8 + Tomcat 8.5。默认的根目录页面显示出App Service Tomcat版本信息，存在一定的安全隐患。

如何来避免这个问题呢？

问题解答

因为在初始创建App Service时，Azure会根据所选Stack， Web Server的信息默认生成首页内容。大多是情况下，在部署您的应用时，默认的首页内容会被替换掉。

App Service默认使用的首页名称如下(这些文件位于wwwroot目录下)：

但对于Java Tomcat服务，默认的首页启动路径为 wwwroot/webapps/ROOT/index.jsp, 所以只需要修改 index.jsp中的内容或者删除这个文件就可以避免根路径 (“/”) 泄露服务信息。

修改步骤

1）登录App Service Kudu站点 ( 在左侧目录栏中选择 Advanced Tools –> Go 进入Kudu站点(https://<your app service name>.scm.chinacloudsites.cn/)), 选择 Debug Console 页面

2) 进入 HOME\SITE\WWWROOT\WEBAPPS\ROOT 目录

点击编辑 index.jsp 或者删除这个文件(文件删除后，访问App Service默认URL会返回404错误)

修改index.jsp文件：

如把内容修改为：This is Java Site...保存后，在浏览器中再次访问App Service

删除index.jsp文件

以上方式均可以避免在App Service的首页暴露服务端Tomcat 信息！

默认生成的Index.jsp 内容

<!DOCTYPE html>

<html lang="en">

    <head>

        <meta charset="utf-8">

            <meta name="viewport" content="width=device-width, initial-scale=1.0">

                <meta http-equiv="X-UA-Compatible" content="IE=edge">

                    <title>Microsoft Azure App Service - Welcome</title>

                    <link rel="SHORTCUT ICON" href="https://c.s-microsoft.com/favicon.ico?v2" type="image/x-icon"/>

                    <link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/bootstrap/4.1.1/css/bootstrap.min.css" crossorigin="anonymous">

                    <link rel="stylesheet" type="text/css" href="https://appservice.azureedge.net/css/linux-landing-page/v3/main.css">

                    <style>

                        #container {

                            position: relative;

                        }

                        #abc{

                            position: relative;

                            bottom: 0px;

                        }

                        .abc{

                            position: relative;

                            bottom: 0px;

                        }

                    </style>

                    <script type="text/javascript">

                        window.onload=function(){try{var a=window.location.hostname;if(a.includes(".azurewebsites.net")){a=a.replace(".azurewebsites.net", "")}var b=document.getElementById("depCenterLink");b.setAttribute("href", b.getAttribute("href") + "&sitename=" + a);}catch(d){}}

                    </script>

    </head>

    <body>

        <nav class="navbar navbar-light bg-light">

            <a class="navbar-brand " href="#">

                <div class="container pl-4 ml-5">

                    <img src="https://appservice.azureedge.net/images/linux-landing-page/v3/microsoft_azure_logo.png" width="270" height="108" alt=""> </div>

            </a>

        </nav>

        <div class="container-fluid container-height mr-2">

            <div class="pt-10 pb-10 mt-10 mb-10 d-xxs-none d-xs-none d-sm-none d-md-none d-lg-block d-xl-block" style="height:20px; width:100%; clear:both;"></div>

            <div class="row">

                <div class="row col-xs-12 col-sm-12 d-block d-lg-none d-xl-none d-md-block d-sm-block d-xs-block">

                    <div class="text-center">

                        <img src="https://appservice.azureedge.net/images/linux-landing-page/v3/java.svg"> </div>

                </div>

                <div class=" extra-pl-small-scr offset-xl-1 offset-lg-1 offset-md-2 offset-sm-2 offset-xs-4 col-xl-5 col-lg-5 col-md-10 col-sm-11 col-xs-11 div-vertical-center">

                    <div class="container-fluid">

                        <div class="row">

                            <h2>Hey, Java developers!</h2>

                        </div>

                        <br>

                        <div class="row">

                            <h4>Your app service is up and running.</h4>

                        </div>

                        <div class="row">

                            <h4>Time to take the next step and deploy your code.</h4>

                        </div>

                        <div class="row info-mg-top">

                            <p class=" pl-0 col-md-6 col-sm-12 info-mg-top">

                                Have your code ready?<br>

                                    Use deployment center to get code published from your client or setup continuous deployment.<br>

                                        <a id='depCenterLink' href="https://go.microsoft.com/fwlink/?linkid=2057852">

                                            <button class="btn btn-primary btn-mg-top" type="submit">Deployment Center</button>

                                        </a>

                            </p>

                            <p class="pl-0 offset-md-1 col-md-5 col-sm-12 info-mg-top">

                                Don't have your code yet?<br>

                                    Follow our quickstart guide and you'll have a full app ready in 5 minutes or less.<br>

                                        <button onclick="location.href='http://aka.ms/java-quickstart-windows'" class="btn btn-primary btn-mg-top" type="submit">Quickstart</button>

                            </p>

                        </div>

                    </div>

                </div>

                <div class="col-xl-5 col-lg-5 col-md-12 d-none d-lg-block">

                    <div class="text-center">

                        <img src="https://appservice.azureedge.net/images/linux-landing-page/v3/java.svg">

                    </div>

                </div>

                <div class="col-xl-1 col-lg-1 col-md-1"></div>

            </div>

            <div class="row">

                <div class=" extra-pl-small-scr offset-xl-1 offset-lg-1 offset-md-2 offset-sm-2 offset-xs-4 col-xl-5 col-lg-5 col-md-10 col-sm-11 col-xs-11 iv-vertical-center">

                    <div class="container-fluid">

                        <div class="row">

                            <b>Technical Information</b>

                        </div>

                        <div class="row">

                            <%@ page import="java.util.*" %>

                            <%

                                ArrayList<String> mainPageProps = new ArrayList<String>();

                                mainPageProps.add("catalina.base");

                                mainPageProps.add("jetty.base");

                                mainPageProps.add("java.version");

                                mainPageProps.add("java.home");

                                for(String name : mainPageProps)

                                {

                                    String value = System.getProperty(name);

                                    if(value != null)

                                    {

                                        out.print(name + ": " + value + "<br>");

                                    }

                                }

                            %>

                        </div>

                    </div>

                </div>

                <div class="col-xl-5 col-lg-5 col-md-12 d-none d-lg-block"></div>

                <div class="col-xl-1 col-lg-1 col-md-1"></div>

            </div>

        </div>

 

        <!-- Bootstrap core JavaScript==================================================-->

        <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-3.2.1.min.js" crossorigin="anonymous"></script>

        <script src="https://ajax.aspnetcdn.com/ajax/bootstrap/4.1.1/bootstrap.min.js" crossorigin="anonymous"></script>

    </body>

</html>Java Index Page