我在 aws 中有一个 64 位 amazon linux 实例。我在该机器上运行着 apache tomcat6。
sudo fuser -v -n tcp 8080
USER PID ACCESS COMMAND
8080/tcp: tomcat 2492 F.... java
如果我做
curl ec2-54-2xx-1xx-1xx.us-2.compute.amazonaws.com:8080
我确实看到了以下网页。
<!--
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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Apache Tomcat</title>
<style type="text/css">
/*<![CDATA[*/
body {
color: #000000;
background-color: #FFFFFF;
font-family: Arial, "Times New Roman", Times, serif;
margin: 10px 0px;
}
img {
border: none;
}
a:link, a:visited {
color: blue
}
th {
font-family: Verdana, "Times New Roman", Times, serif;
font-size: 110%;
font-weight: normal;
font-style: italic;
background: #D2A41C;
text-align: left;
}
td {
color: #000000;
font-family: Arial, Helvetica, sans-serif;
}
td.menu {
background: #FFDC75;
}
.center {
text-align: center;
}
.code {
color: #000000;
font-family: "Courier New", Courier, monospace;
font-size: 110%;
margin-left: 2.5em;
}
#banner {
margin-bottom: 12px;
}
p#congrats {
margin-top: 0;
font-weight: bold;
text-align: center;
}
p#footer {
text-align: right;
font-size: 80%;
}
/*]]>*/
</style>
</head>
<body>
<!-- Header -->
<table id="banner" width="100%">
<tr>
<td align="left" style="width:130px">
<a href="http://tomcat.apache.org/">
<img src="tomcat.gif" height="92" width="130" alt="The Mighty Tomcat - MEOW!"/>
</a>
</td>
<td align="left" valign="top"><b>Apache Tomcat</b></td>
<td align="right">
<a href="http://www.apache.org/">
<img src="asf-logo-wide.gif" height="51" width="537" alt="The Apache Software Foundation"/>
</a>
</td>
</tr>
</table>
<table>
<tr>
<!-- Table of Contents -->
<td valign="top">
<table width="100%" border="1" cellspacing="0" cellpadding="3">
<tr>
<th>Administration</th>
</tr>
<tr>
<td class="menu">
<a href="/manager/status">Status</a><br/>
<a href="/manager/html">Tomcat Manager</a><br/>
</td>
</tr>
</table>
<br />
<table width="100%" border="1" cellspacing="0" cellpadding="3">
<tr>
<th>Documentation</th>
</tr>
<tr>
<td class="menu">
<a href="RELEASE-NOTES.txt">Release Notes</a><br/>
<a href="/docs/changelog.html">Change Log</a><br/>
<a href="/docs">Tomcat Documentation</a><br/>
</td>
</tr>
</table>
<br/>
<table width="100%" border="1" cellspacing="0" cellpadding="3">
<tr>
<th>Tomcat Online</th>
</tr>
<tr>
<td class="menu">
<a href="http://tomcat.apache.org/">Home Page</a><br/>
<a href="http://tomcat.apache.org/faq/">FAQ</a><br/>
<a href="http://tomcat.apache.org/bugreport.html">Bug Database</a><br/>
<a href="http://mail-archives.apache.org/mod_mbox/tomcat-users/">Users Mailing List</a><br/>
<a href="http://mail-archives.apache.org/mod_mbox/tomcat-dev/">Developers Mailing List</a><br/>
<a href="irc://irc.freenode.net/#tomcat">IRC</a><br/>
</td>
</tr>
</table>
<br/>
<table width="100%" border="1" cellspacing="0" cellpadding="3">
<tr>
<th>Miscellaneous</th>
</tr>
<tr>
<td class="menu">
<a href="/examples/servlets/">Servlets Examples</a><br/>
<a href="/examples/jsp/">JSP Examples</a><br/>
<a href="http://wiki.apache.org/tomcat/Specifications">Specifications</a><br/>
</td>
</tr>
</table>
</td>
<td style="width:20px"> </td>
<!-- Body -->
<td align="left" valign="top">
<p id="congrats">If you're seeing this page via a web browser, it means you've setup Tomcat successfully. Congratulations!</p>
<p>As you may have guessed by now, this is the default Tomcat home page. It can be found on the local filesystem at:</p>
<p class="code">$CATALINA_HOME/webapps/ROOT/index.html</p>
<p>where "$CATALINA_HOME" is the root of the Tomcat installation directory. If you're seeing this page, and you don't think you should be, then you're either a user who has arrived at new installation of Tomcat, or you're an administrator who hasn't got his/her setup quite right. Providing the latter is the case, please refer to the <a href="/docs">Tomcat Documentation</a> for more detailed setup and administration information than is found in the INSTALL file.</p>
<p><b>NOTE: For security reasons, using the manager webapp
is restricted to users with certain roles such as "manager-gui".</b>
Users are defined in <code>$CATALINA_HOME/conf/tomcat-users.xml</code>.</p>
<p>Included with this release are a host of sample Servlets and JSPs (with associated source code), extensive documentation, and an introductory guide to developing web applications.</p>
<p>Tomcat mailing lists are available at the Tomcat project web site:</p>
<ul>
<li><b><a href="http://tomcat.apache.org/lists.html#tomcat-users">tomcat-users</a></b> for general questions related to configuring and using Tomcat</li>
<li><b><a href="http://tomcat.apache.org/lists.html#tomcat-dev">tomcat-dev</a></b> for developers working on Tomcat</li>
</ul>
<p>Thanks for using Tomcat!</p>
<p id="footer"><img src="tomcat-power.gif" width="77" height="80" alt="Powered by Tomcat"/><br/>
Copyright © 1999-2014 Apache Software Foundation<br/>
All Rights Reserved
</p>
</td>
</tr>
</table>
</body>
</html>
但是，如果我尝试从外部机器的 Web 浏览器访问 Web 服务器，则会收到以下错误。
Google Chrome's connection attempt to ec2-54-2xx-1xx-1xx.us-2.compute.amazonaws.com was rejected. The website may be down, or your network may not be properly configured. Currently I have configured my security groups (both inbound and outbound) to allow all traffic from any machine.
我正在尝试从公司网络访问它。我的公司防火墙是否可能阻止了它？如果是，那是什么原因？
在安全设置中，我对入站和出站设置了以下值。
Type Protocol Port Range Source
All traffic All All 0.0.0.0/0
我仍然无法从外部访问网络服务器。
答案1
登录 AWS 控制台并转到“安全组”部分。在此处的“入站”中添加一个名为“自定义 TCP 规则”的新规则并输入自定义端口范围 8080。
现在在浏览器中输入 {ipaddress}:8080
答案2
默认情况下，AWS 实例启动时没有任何可从互联网访问的端口。您需要更改 VPC 的安全组设置。为此，请在 EC2 列表中选择您的实例。在您选择实例的框架下，您将看到一堆有关该实例的随机数据，包括“安全组” - 单击此处可修改该实例的防火墙规则。请注意，根据您的 VPC 设置方式，更改这些规则可能会影响多个实例。
一旦您知道它的存在并进行探索，它就非常明显。