firewall - Finding out which outgoing port needs to be opened

24
2014-07
  • configurator

    I've got an application that used to work perfectly with all outgoing ports open and all incoming ports closed. Now we've closed all outgoing ports except a few specific ones e.g. http and it's not working any more. Is there a way I can find out using tools like wireshark which outgoing request is getting blocked so I can tell my sysadmin what to open?

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    windows 7 - How can I find out if a port is opened or not?
  • Roman

    I have installed Apache server on my Windows 7 computer. I was able to display the default index.php by typing http://localhost/ in the address line of my browser.

    However, I am still unable to see this page by typing IP address of my computer (neither locally (from the same computer) no globally (from another computer connected to the Internet)).

    I was told that I need to open port 80. I did it (in a way described here) but it did not solve the problem.

    First of all I would like to check which ports are opened and which are not. For example I am not sure that my port 80 was closed before I tried to open. I am also not sure that it is opened after I tried to open it.

    I tried to run a very simple web server written in Python. For that I used port 81 and it worked! And I did not try to open the port 81. So, it was opened by default. So, if 81 is opened by default, why 80 is not? Or it is?

    ADDITIONAL INFORMATION:
    1. In my httpd.conf file I have "Listen 80".
    2. This site tells me that port 80 on my computer is opened.
    3. I get different responses if I try http://myip:80 and http://myip:81. In the last case browser (Chrome) writes me that link is broken. In the first case I get: Forbidden You don't have permission to access / on this server.
    4. IE writes that "The website declined to show this webpage".


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