在 Ubuntu AWS 上打开端口 80

Question

我正在ubuntuAWS 实例中托管的机器上运行 tomcat 服务器。我可以达到通过服务器public_ip:8080，但是当我在改变监听端口server.xml从8080到80连接远程主机拒绝。

端口号80在 上启用AWS firewall。

我ufw通过检查sudo ufw status但结果是inactive

是ufw底层的防火墙机制的前端？

如何启用端口80上firewall？

预先感谢。

的输出iptables -S：

-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT

输出 netstat -punta

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN      785/mysqld
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      613/sshd
tcp        0      0 172.31.1.56:22          92.45.23.114:3913       ESTABLISHED 5825/sshd: ubuntu [
tcp        0      0 172.31.1.56:22          92.45.23.114:19374      ESTABLISHED 7320/sshd: ubuntu [
tcp        0      0 172.31.1.56:22          92.45.23.114:28051      ESTABLISHED 6901/sshd: ubuntu [
tcp        0    272 172.31.1.56:22          92.45.23.114:9327       ESTABLISHED 7428/sshd: ubuntu [
tcp        0      0 172.31.1.56:22          92.45.23.114:7597       ESTABLISHED 7034/sshd: ubuntu [
tcp        0      0 127.0.0.1:3306          127.0.0.1:45655         ESTABLISHED 785/mysqld
tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      7275/java
tcp6       0      0 :::8080                 :::*                    LISTEN      7275/java
tcp6       0      0 :::22                   :::*                    LISTEN      613/sshd
tcp6       0      0 127.0.0.1:45655         127.0.0.1:3306          ESTABLISHED 7275/java
udp        0      0 0.0.0.0:68              0.0.0.0:*                           538/dhclient3

netstat -na |grep \:80将端口更改为之前的输出80：

tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN
tcp6       0      0 :::8080                 :::*                    LISTEN

netstat -na |grep \:80将端口更改为后的输出80：

tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN

浏览器在端口上的输出80：

ERROR

The requested URL could not be retrieved

The following error was encountered while trying to retrieve the URL: http://54.194.236.229/TransportationAutomation/personnel.xhtml

Connection to 54.194.236.229 failed.

The system returned: (111) Connection refused

The remote host or network may be down. Please try the request again.

Your cache administrator is webmaster.


Generated Fri, 14 Feb 2014 15:01:06 GMT by proxy (squid/2.7.STABLE7)

端口定义部分 server.xml

<Connector port="8080" protocol="HTTP/1.1"
           connectionTimeout="20000"
           URIEncoding="UTF-8"
           redirectPort="8443" />

启动tomcat时Catalina.out的一部分port 80：

Feb 14, 2014 3:04:25 PM org.apache.coyote.AbstractProtocol init
SEVERE: Failed to initialize end point associated with ProtocolHandler ["http-bio-80"]
java.net.BindException: Permission denied <null>:80
  at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:391)
  at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:554)
  at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:409)
  at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:119)
  at org.apache.catalina.connector.Connector.initInternal(Connector.java:956)
  at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
  at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559)
  at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
  at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:815)
  at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
  at org.apache.catalina.startup.Catalina.load(Catalina.java:594)
  at org.apache.catalina.startup.Catalina.load(Catalina.java:619)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:606)
  at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:281)
  at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:449)
Caused by: java.net.BindException: Permission denied
  at java.net.PlainSocketImpl.socketBind(Native Method)
  at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:376)
  at java.net.ServerSocket.bind(ServerSocket.java:376)
  at java.net.ServerSocket.<init>(ServerSocket.java:237)
  at java.net.ServerSocket.<init>(ServerSocket.java:181)
  at org.apache.tomcat.util.net.DefaultServerSocketFactory.createSocket(DefaultServerSocketFactory.java:49)
  at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:378)
... 17 more 

更新 2：

我通过安装了 tomcat，apt-get所以它是一个重新打包的 tomcat 版本。这里说以 root 身份运行 tomcat 将解决问题，但这里说Tomcat should not be run under the root user.没有任何可能的方法可以使用重新打包的 tomcat 实例来处理它吗？

更新 3：

我想这是我问题的答案

Answer 1

是的。它就像一个易于使用的 iptables 版本。试试写，看iptables防火墙规则：

$ sudo iptables -L

您可以使用以下命令打开端口 80：

$ sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT

如果您需要，我可以为您描述这条线。就告诉我嘛 ：-）

Answer 2

这对我有用：

以 root 身份运行：

iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080