Failed to open ports on Windows server 2019

Y Joe 61 Reputation points
Jan 6, 2021, 1:46 AM

we are trying to open ports 6300 on Windows server 2019, we tried to add rules in
Windows Defender Firewall with Advanced Security -> Inbound Rules and Outbound rules, Edge Traversal is set as "Allow edge traversal"
53841-port01.png
53842-04.jpg

the port 6300 is not list under netstat -an
53843-02.jpg

when we tried to telnet, it failed with this error
53773-03.jpg

The result is the same no matter we turn off or turn on the firewall ( Domain, Private, Public)
Anyone knows Is there any thing we missed in the setting? Thank you.

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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Accepted answer
  1. Anonymous
    Jan 6, 2021, 2:15 AM

    Allowing the port to flow through firewall has nothing to do with listening process. What process do you expect to answer? I'd check that it is configured correctly and is running.

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4 additional answers

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  1. Y Joe 61 Reputation points
    Jan 6, 2021, 3:02 AM

    as we are preparing the environment for the installation of another product,

    is that means we have to wait until the installation is done to see if the process is running on that port?

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  2. Anonymous
    Jan 6, 2021, 3:04 AM

    Yes, that's 100% correct. You could give this one a go.
    https://gallery.technet.microsoft.com/scriptcenter/Listen-Port-Powershell-8deb99e4

    --please don't forget to Accept as answer if the reply is helpful--


  3. Y Joe 61 Reputation points
    Jan 6, 2021, 3:23 AM

    thanks, will post the update when we are able to carry out further testing after the installation next week.


  4. Gloria Gu 3,906 Reputation points
    Jan 6, 2021, 9:11 AM

    Hi,

    Thank you for posting in Q&A!

    There is a difference between having a process listening on the port and having the port allowed on the firewall.

    1.If you set an inbound rule to allow connect port 6300, this port will be open.

    2.When you use netstat -an command and telnet, only when there's application which are using port 6300, will show listening or telnet successfully.

    Since you haven't installed the application used for port 6300, it's normal phenomenon that the port 6300 is not list under netstat -an& fail to telnet.

    Hope you have a nice day : )
    Gloria

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