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    <p>Hi,</p>
    <p>QGIS can run offline. Of course you need Internet to download the
      software.</p>
    <p>Certain aspects (optional) require an internet connection.
      Examples are:</p>
    <ul>
      <li>Base maps (e.g. OpenStreetmap)</li>
      <li>Download of additional plugins from the Repository</li>
      <li>Usage of OGC services (WMS/WFS/WMTS)</li>
      <li>Some plugins may have additional requirements</li>
    </ul>
    <p>Regarding ports: the above mentioned services require port 443
      and/or 80 (normal web ports). If you want to access databases,
      there are additional ports to open (perhaps only on LAN), e.g. for
      Postgis the standard port is 5432 - but you can run it on other
      ports as well.<br>
    </p>
    <p>Regarding proxy: if your web browser requires a proxy, QGIS will
      have to use the same proxy as well.</p>
    <p>Greetings,</p>
    <p>Andreas<br>
    </p>
    <br>
    <div class="moz-cite-prefix">Am 27.06.2018 um 16:31 schrieb pompo
      santos:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAA_idNeu2ZS2oP-n=VmgS=SpBR6bNtWh=mtpD1Y4W7EaV951ZA@mail.gmail.com">
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        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US">Hello.<span></span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US"><span> </span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US">I would
            like to ask if software QSIG has any special requirements to
            use it or ,
            if is it required to have internet use always ?<span></span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US">Which
            internet ports does the application use? Do you have any
            requirements?<span></span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US"><span> </span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US">- Is this
            installation required to bypass firewall or , proxy in a
            company?<span></span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US"><span> </span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US">-Do I have
            to open a special port in firewall?, or , just internet port
            HTTPS?<span></span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
            lang="EN-US"><span> </span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Thanks,
          <span></span></p>
        <p class="MsoNormal" style="margin:0cm 0cm
          0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Regards,<span></span></p>
        <br>
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    </blockquote>
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