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Amazon EC2 - Security Group Settings

Posted on 2014-04-12
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Last Modified: 2014-04-12
I've already modified security settings on my EC2 instance and have gotten what I wanted from doing that (ability to ping and ability to reach the instance via my browser) but I've probably opened the security settings to broadly and compromised security of the instance. I've attached screen shots of the settings, can you help with this?
EC2-Security-Settings.docx
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Question by:cbridgman
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by:Zephyr ICT
ID: 39996518
For starters I'd definitely remove the All TCP ports inbound rule ... That's very unsafe!
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by:cbridgman
ID: 39996526
The reason that I put the TCP ports thing in there is that I have installed websphere on the server and deployed a web-based application on it. Now that it is there, I need to be able to access that application's user interface through a browser from any PC I'm on. Before adding the ALL TCP entry, I was unable to do that. Once I added it, I was able to access the application via a browser.

Is there another or better way to do that?
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Expert Comment

by:Zephyr ICT
ID: 39996529
Yeah ... There should be, find out which ports websphere is using and the other applications, maybe you can use netstat to find out which ports are open when you're using the application?

in a command window type "netstat -an" for example ...

For the record, these are all the ports websphere is using apparently: http://publib.boulder.ibm.com/infocenter/wsdoc400/v6r0/index.jsp?topic=/com.ibm.websphere.iseries.doc/info/ae/ae/adrportbase.htm

I'd start with configuring these instead of the all TCP ports.
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Author Comment

by:cbridgman
ID: 39996530
Okay, I will give that a try. I really am a novice at this kind of stuff so your assistance is really appreciated. I will let you know how that goes.
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Accepted Solution

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Zephyr ICT earned 500 total points
ID: 39996534
No problem, I'm still here for a little while ... We all have to learn, I'm still learning every day ;)
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Author Comment

by:cbridgman
ID: 39996700
RDP solution works like a charm.

Thanks for the expert help.
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Author Comment

by:cbridgman
ID: 39996701
I closed down the ports that are available to TCP and all is working fine.

Again, thanks for the expert help.
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Expert Comment

by:Zephyr ICT
ID: 39996721
Ok, glad to hear it!! Thanks!
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