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  1. Help-Desk
  2. HELP-5717

Opened port in security groups not working

        Details

        • Type: extRequest
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Fix Version/s: 2021
        • Component/s: None
        • Labels:
          None

          Description

          I've opened the 9092 TCP port in my VM (130.206.126.234) and it is not accessible from the outside.

          I've run a netcat listening in that port:

          $ nc -l 9092

          Then I've run a telnet from a remote machine (e.g. my laptop):

          $ telnet 130.206.126.234 9092
          Trying 130.206.126.234...
          telnet: connect to address 130.206.126.234: Operation timed out
          telnet: Unable to connect to remote host

          Please, have a look on the attachment in order to check the port is opened.

          Regards,
          Francisco

            Activity

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            jicg José Ignacio Carretero Guarde added a comment -

            There is a firewall active inside the VM. That firewall is the one which is preventing your port to be reachable, not Openstack security groups.

            We'll need to investigate if there is a problem with the base image or if this just happened when you installed any new packages.

            regards,
            José Ignacio.

            Show
            jicg José Ignacio Carretero Guarde added a comment - There is a firewall active inside the VM. That firewall is the one which is preventing your port to be reachable, not Openstack security groups. We'll need to investigate if there is a problem with the base image or if this just happened when you installed any new packages. regards, José Ignacio.
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            jicg José Ignacio Carretero Guarde added a comment -

            By default, the CentOS mainstream has its own firewall activated which is added to the Security groups. As this is the default behavior for CentOS, it will keep working this way.

            If you need to disable the internal firewall in your CentOS, you can do this by running this two commands as root:

            1. iptables -F
            2. iptables-save > /etc/sysconfig/iptables

            Regards,
            José Ignacio.

            Show
            jicg José Ignacio Carretero Guarde added a comment - By default, the CentOS mainstream has its own firewall activated which is added to the Security groups. As this is the default behavior for CentOS, it will keep working this way. If you need to disable the internal firewall in your CentOS, you can do this by running this two commands as root: iptables -F iptables-save > /etc/sysconfig/iptables Regards, José Ignacio.

              People

              • Assignee:
                jicg José Ignacio Carretero Guarde
                Reporter:
                frb Francisco Romero
              • Votes:
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                Watchers:
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                Dates

                • Created:
                  Updated:
                  Resolved: