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Editorial Team
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Asked: 2026-05-17T17:53:04+00:00

I’m pretty new with ec2, firewall settings etc, so I might be missing something

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I’m pretty new with ec2, firewall settings etc, so I might be missing something obvious, but:

  • I’ve created a ‘getting started with windows’ instance
  • with a security group that has 5080 specified
  • and is associated with an elastic ip

On the instance I have a red5 server running. when I run the server it on 127.0.0.1:5080, i can access it from a browser on that instance, so I know the server works.

When I run it on the elastic IP however, I can’t connect to it, neither from within the instance nor from outside.

when I run telnet 75.101.147.86 5080 from the outside world i get ‘connection refused’

Any clues on how to debug this would be highly appreciated!

Thanks in advance,

Martin

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1 Answer

  1. Editorial Team

    In the AWS management console.

    1 goto Amazon EC2 tab

    2 Click on Instances and note the Security Group Name from the Security Group column for the instance you want to open it for.

    3 Click on the link Security Groups

    4 Click on the Security Group Name from step 2.

    5 You should see a dropdown that says SSH, click it and select Custom..

    6 Enter:

     Protocol                  TCP
 From Port                 5080
 To Port                   5080
 Source (IP or Group)      0.0.0.0/0       -- NOTE 1

    7 Click Save.

    If you need UDP also, then repeat using Protocol UDP in step 6.

    NOTE 1: Read : http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing for more info… but don’t try to limit the subnet until you have it working for the world.

    If it doesn’t work after that then you may have a firewall on the instance. I’m more of an ubuntu guy, but try this : http://www.cyberciti.biz/faq/disable-linux-firewall-under-centos-rhel-fedora/ for RedHat

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