blocks|key|374712|text|您是否启用了所有ips的http端口？这可以通过转到以下地址来实现：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|374713|EC2+->安全组->默认(或您的客户)+->入站|374714|然后为HTTP创建一个新规则，作为源，您应该指定:+0.0.0.0/0|374715|这应该就行了。|374716|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Did you enable the http port to all ips? That would be done by going to:

EC2 -> Security Group -> Default (or your custome one) -> Inbound 

And then Create a new rule for HTTP and as a source, you should assign: 0.0.0.0/0

That should do it.

blocks|key|590447|text|早些时候，我在这里寻找一个类似问题的解决方案。在我的示例中，除了EC2安全组之外，EC2实例还运行了自己的防火墙。命令'system-config-firewall‘让我打开端口。默认情况下，端口80+(HTTP)和3306+(MySQL)未打开。22+(SSH)是开放的。我还必须执行'yum+install+system-config-firewall‘。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|590448|总而言之，我的解决方案是：|590449|>+yum+install+system-config-firewall
>+system-config-firewall|code-block|syntax|javascript|590450|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I was here earlier looking for a solution to a similar problem I was having. It turns out in my case that the EC2 instance also had its own firewall running in addition to the EC2 security group. The command 'system-config-firewall' let me get in to open the ports. Ports 80 (HTTP) and 3306 (MySQL) were not open by default. 22 (SSH) was open. I also had to do 'yum install system-config-firewall'.

To summarize, my solution was:

<pre><code>&gt; yum install system-config-firewall
&gt; system-config-firewall
</code></pre>

blocks|key|590495|text|这个答案是为那些不知道自己在用ec2实例做什么的新手准备的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|590496|我遇到了同样的问题，并尝试了所有的安全组修复程序，但都没有效果。|590497|结果，我需要从命令行打开我的服务器。|590498|sudo+service+httpd+start+|code-block|syntax|javascript|590499|有时天很黑，不是因为保险丝烧断了，而是因为你没有按下开关。|590500|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This answer is for the newbies who have no idea what they are doing with an ec2 instance.

I was having the same problem and tried all the Security Group fixes to no avail.

As it turns out, I needed to turn on my server from the command line.

<pre><code>sudo service httpd start 
</code></pre>

Sometimes it's dark, not because a fuse blew, but because you didn't flick the switch.

blocks|key|374860|text|章鱼的答案对我来说是正确的，除了一台Windows机器。我需要去Windows防火墙，如果所有的流量不符合规则，就会阻止所有的流量流出虚拟机。规则中没有启用端口80，因此我只需添加一个端口。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|374861|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Octopus' answer was the correct one for me, except for a Windows machine.
I needed to go to the Windows Firewall, was blocking all traffic out of the VM if it didn't match a rule. Port 80 wasn't enabled in a rule, so I merely had to add one.

blocks|key|590607|text|我也在努力解决同样的问题，也创建了安全组，但没有应用到实例中。只需为http创建新规则。在实例上右键申请，选择安全组并分配。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|590608|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I was also struggling with same problem had created security group as well, but did not applied to the instance. Just create new rule for http. And apply from right click instance and choose security group and assign it.

blocks|key|590653|text|我也有同样的问题，因为我没有使用Ubuntu或linux的经验，所以一直绞尽脑汁。来自Parag的答案解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|590654|我非常愚蠢，因为我忘记安装web服务器(HTTP服务器)，因为我的ec2实例公网IP无法工作。回答这个问题也是一个不应该像我一样错过的原因之一。|590655|您可以安装以下两种工具之一：|590656|nginx：|590657|sudo+apt-get+install+nginx|code-block|syntax|javascript|590658|apache2：|590659|sudo+apt-get+install+apache2|590660|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|Y|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

I had the same issue, been racking my brain bad since I have no experience with Ubuntu or linux. The answer from Parag fixed it. 

Very stupid of me as I forgot to install web server (HTTP server) because of which my ec2 instance public IP was not working. Answering this question as this can also be one of the reason which one should not miss as I did.

You can install either,

nginx:

<pre><code>sudo apt-get install nginx
</code></pre>

apache2:

<pre><code>sudo apt-get install apache2
</code></pre>

blocks|key|590693|text|我的问题是浏览器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|590694|Chrome可以工作；Firefox不能工作。|590695|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

My problem was the browser.
Chrome works; Firefox DOES NOT work.

blocks|key|375002|text|对我来说，这就像在我的浏览器上把网址从https://my-site改为http://my-site一样简单。(此方案仅适用于仍能通过SSH连接到ec2实例，但无法通过浏览器连接的人员)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|375003|entityMap^0|J|F|10|E|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

For me, It was as simple as just changing the url from <code>https://my-site</code> to <code>http://my-site</code> on my browser. (This solution only applies to people who are still able to SSH onto the ec2 instance but cannot connect via browser)

blocks|key|590759|text|当我尝试从浏览器访问公网IP时，无法访问我的My+Ec2实例。检查完以上所有设置后，我必须更新阻止传入流量的Windows+(Defender)防火墙设置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|590760|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

My Windows Ec2 instance was not accessible when I tried to access the public IP from the browser. After checking all the above, I had to update the Windows (Defender) Firewall setting which was blocking the incoming traffic.

blocks|key|375091|text|最好的方法是编辑安全入站规则。请参考下面的快照。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|375092|​|375093|📷|atomic|offset|length|375094|375095|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/2910989f6d9cb566c7fde68ca757a550.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

The best way is to edit your security inbound rules. Please refer to below snap.
<a href="https://i.stack.imgur.com/1Olps.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1Olps.png" alt="enter image description here" /></a>

I've been experimenting with EC2 for a couple days and have been banging my head against simply even being able to access the sample site I've hosted. The stack is Rails 3.1.3 with Thin and Nginx. 

I've tried several different configurations and finally ended up running the Nginx auto install script, which does return a webpage when I do a curl <a href="http://ec2-107-20-143-179.compute-1.amazonaws.com/">http://ec2-107-20-143-179.compute-1.amazonaws.com/</a>. However, when I point my browser there, it hangs forever before saying the page cannot be found.

I have assigned an Elastic IP address, and I've enabled HTTP access via port 80. 

I don't much experience with the sysadmin side and I'm basically stumped at this point. Any advice would be greatly appreciated.

Can't access site on EC2 instance via public ip

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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