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    Everton,<br>
    <br>
    What exact variant and version of Linux are you using?<br>
    Please send me the output of these:<br>
        ifconfig -a<br>
        ip addr list<br>
        sysctl -a | egrep -i 'ipv?6'<br>
        lsmod<br>
    <br>
    Thanks!<br>
    Jules.<br>
    <br>
    <div class="moz-cite-prefix">On 05/11/2020 18:53, Everton Bruno
      Bernardi wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:WM!f0196c2cd4c09f606bebf5def3f12634c190380028daa786ba8aa2799406b36c6092a497f1499bac69da7f7cd114964f!@mx.jul.es">
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        <div class="gmail_default"
          style="font-family:tahoma,sans-serif;font-size:small;color:#20124d">Jules,</div>
        <div class="gmail_default"
          style="font-family:tahoma,sans-serif;font-size:small;color:#20124d"><br>
        </div>
        <div class="gmail_default"
          style="font-family:tahoma,sans-serif;font-size:small;color:#20124d">IPV6
          was enabled. Disabled IPV6 and rebooted the box but the issue
          persists. </div>
        <div class="gmail_default"
          style="font-family:tahoma,sans-serif;font-size:small;color:#20124d">:/</div>
        <div class="gmail_default"
          style="font-family:tahoma,sans-serif;font-size:small;color:#20124d"><br>
        </div>
        <div class="gmail_default"
          style="font-family:tahoma,sans-serif;font-size:small;color:#20124d"><br>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Thu, Nov 5, 2020 at 3:18 PM
          Jules <<a href="mailto:Jules@zend.to"
            moz-do-not-send="true">Jules@zend.to</a>> wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div> Everton,<br>
            <br>
            I've just had a dig through my mail archives.<br>
            <br>
            Some folks at Brunel University in the UK had the same
            problem. Here is their comment on the problem and how they
            fixed it:<br>
            <br>
            <font color="red">Reason for reCAPTCHA problem we understood
              relates to the firewall and IPV6 settings.<br>
              Recently we had firewall and network changes implemented
              to our data centre which had impact on IPV6 related
              connectivity in Linux environment.<br>
              We have disabled IPV6 on dropoff server and it worked fine
              without any issues. <br>
            </font><br>
            Hope that helps,<br>
            Jules.<br>
            <br>
            <div>On 05/11/2020 17:09, Everton Bruno Bernardi wrote:<br>
            </div>
            <blockquote type="cite">
              <div dir="ltr">
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Jules,</div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                </div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Thanks
                  for that. I changed the code you sent me but it had no
                  effect. The same error occurs.</div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Am
                  I able to send any debug information to help you out?
                  If so, please tell me how can I get it.</div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                </div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                </div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Regards,</div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                </div>
                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Everton</div>
              </div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr" class="gmail_attr">On Thu, Nov 5, 2020 at
                  12:10 PM Jules <<a href="mailto:Jules@zend.to"
                    target="_blank" moz-do-not-send="true">Jules@zend.to</a>>
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0px 0px
                  0px 0.8ex;border-left:1px solid
                  rgb(204,204,204);padding-left:1ex">
                  <div> Hi Everton,<br>
                    <br>
                    I've just compared the code from 5.03 to the latest,
                    for this specific problem.<br>
                    <br>
                    Try applying this patch (manually with a text editor
                    is just fine!) to /opt/zendto/www/verify.php:<br>
                    <br>
                    <tt>97,101c110,111</tt><tt><br>
                    </tt><tt><             // Old version 1 code.</tt><tt><br>
                    </tt><tt><             // $resp =
                      recaptcha_check_answer($reCaptchaPrivateKey,</tt><tt><br>
                    </tt><tt><            
                      //                                getClientIP(),</tt><tt><br>
                    </tt><tt><            
                      //                               
                      $_POST["g-recaptcha-response"]);</tt><tt><br>
                    </tt><tt><             $recaptcha = new
                      \ReCaptcha\ReCaptcha($reCaptchaPrivateKey);</tt><tt><br>
                    </tt><tt>---</tt><tt><br>
                    </tt><tt>>             $recaptcha = new
                      \ReCaptcha\ReCaptcha($reCaptchaPrivateKey,</tt><tt><br>
                    </tt><tt>>                            new
                      \ReCaptcha\RequestMethod\CurlPost());</tt><br>
                    <br>
                    If that helps, apply this (very similar) patch to
                    /opt/zendto/www/pickup.php as that's the other place
                    this call appears:<br>
                    <br>
                    <tt>130c143,144</tt><tt><br>
                    </tt><tt><           $recaptcha = new
                      \ReCaptcha\ReCaptcha($reCaptchaPrivateKey);</tt><tt><br>
                    </tt><tt>---</tt><tt><br>
                    </tt><tt>>           $recaptcha = new
                      \ReCaptcha\ReCaptcha($reCaptchaPrivateKey,</tt><tt><br>
                    </tt><tt>>             new
                      \ReCaptcha\RequestMethod\CurlPost());</tt><br>
                    <br>
                    I've never managed to figure out why sites which
                    have been working perfectly well on the default
                    suddenly stop doing so, with apparently no changes
                    anywhere (except at Google?). But using the
                    CurlPost() technique seems to work well for
                    everyone.<br>
                    <br>
                    Let me know how you get on.<br>
                    <br>
                    Cheers,<br>
                    Jules.<br>
                    <br>
                    <div>On 05/11/2020 14:54, Everton Bruno Bernardi
                      wrote:<br>
                    </div>
                    <blockquote type="cite">
                      <div dir="auto">Hi Jules,
                        <div dir="auto"><br>
                        </div>
                        <div dir="auto">Thanks for your considerations.</div>
                        <div dir="auto">Unfortunately this is happening
                          to all of our users (including external).</div>
                        <div dir="auto"><br>
                        </div>
                        <div dir="auto">I've already tried on other
                          browsers and the same happens.</div>
                        <div dir="auto"><br>
                        </div>
                        <div dir="auto"><br>
                        </div>
                      </div>
                      <br>
                      <div class="gmail_quote">
                        <div dir="ltr" class="gmail_attr">Em qui, 5 de
                          nov de 2020 11:18, Jules <<a
                            href="mailto:Jules@zend.to" target="_blank"
                            moz-do-not-send="true">Jules@zend.to</a>>
                          escreveu:<br>
                        </div>
                        <blockquote class="gmail_quote"
                          style="margin:0px 0px 0px
                          0.8ex;border-left:1px solid
                          rgb(204,204,204);padding-left:1ex">
                          <div> Everton,<br>
                            <br>
                            Please can you try a couple of things:<br>
                            1. Close all your browser tabs except 1
                            showing something like Google's home page.
                            Clear your browser cache completely, then
                            quit and restart your browser. Does the
                            problem still occur?<br>
                            2. Try from an incognito/private browser
                            window. Does that make it behave?<br>
                            <br>
                            If number 2 makes it behave, then the
                            browser cache isn't being fully cleared, as
                            that's the only important difference as far
                            as a new tab is concerned.<br>
                            <br>
                            Anyone else seeing this problem?<br>
                            <br>
                            Cheers,<br>
                            Jules.<br>
                            <br>
                            <div>On 05/11/2020 13:31, Everton Bruno
                              Bernardi via ZendTo wrote:<br>
                            </div>
                            <blockquote type="cite">
                              <div dir="ltr">
                                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Hi
                                  there,</div>
                                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                                </div>
                                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Recently
                                  we've been facing the following issue
                                  with ZendTo (version 5.03 - a lot old,
                                  I know):</div>
                                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                                </div>
                                <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">
                                  <div><img alt="image.png"
                                      moz-do-not-send="true" width="452"
                                      height="275"><br>
                                  </div>
                                </div>
                                <div><br>
                                </div>
                                <div>
                                  <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">I've
                                    confirmed the reCAPTCHA keys and
                                    everything seems to be correct.</div>
                                  <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">What
                                    could I do in order to know what's
                                    really happening?</div>
                                  <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                                  </div>
                                  <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                                  </div>
                                  <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Thanks
                                    in advance.</div>
                                  <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)"><br>
                                  </div>
                                  <div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:small;color:rgb(32,18,77)">Regards</div>
                                  <br>
                                </div>
                                -- <br>
                                <div dir="ltr">
                                  <div dir="ltr"><font face="georgia,
                                      serif"><i><a
                                          href="http://google.com/+EvertonBrunoBernardi"
                                          rel="noreferrer"
                                          target="_blank"
                                          moz-do-not-send="true">Everton
                                          Bruno Bernardi</a></i></font><br>
                                    <br>
                                    <br>
                                  </div>
                                </div>
                              </div>
                              <br>
                              <fieldset></fieldset>
                              <pre>_______________________________________________
ZendTo mailing list
<a href="mailto:ZendTo@zend.to" rel="noreferrer" target="_blank" moz-do-not-send="true">ZendTo@zend.to</a>
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</pre>
                            </blockquote>
                            <br>
                            <pre cols="72">Jules

-- 
Julian Field MEng CEng CITP MBCS MIEEE MACM


<a href="http://www.Zend.To" rel="noreferrer" target="_blank" moz-do-not-send="true">www.Zend.To</a>
Twitter: @JulesFM
</pre>
                          </div>
                        </blockquote>
                      </div>
                    </blockquote>
                    <br>
                    <pre cols="72">Jules

-- 
Julian Field MEng CEng CITP MBCS MIEEE MACM


<a href="http://www.Zend.To" target="_blank" moz-do-not-send="true">www.Zend.To</a>
Twitter: @JulesFM
</pre>
                  </div>
                </blockquote>
              </div>
              <br clear="all">
              <div><br>
              </div>
              -- <br>
              <div dir="ltr">
                <div dir="ltr"><font face="georgia, serif"><i><a
                        href="http://google.com/+EvertonBrunoBernardi"
                        target="_blank" moz-do-not-send="true">Everton
                        Bruno Bernardi</a></i></font><br>
                  <br>
                  <br>
                </div>
              </div>
            </blockquote>
            <br>
            <pre cols="72">Jules

-- 
Julian Field MEng CEng CITP MBCS MIEEE MACM


<a href="http://www.Zend.To" target="_blank" moz-do-not-send="true">www.Zend.To</a>
Twitter: @JulesFM
</pre>
          </div>
        </blockquote>
      </div>
      <br clear="all">
      <div><br>
      </div>
      -- <br>
      <div dir="ltr" class="gmail_signature">
        <div dir="ltr"><font face="georgia, serif"><i><a
                href="http://google.com/+EvertonBrunoBernardi"
                target="_blank" moz-do-not-send="true">Everton Bruno
                Bernardi</a></i></font><br>
          <br>
          <br>
        </div>
      </div>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">Jules

-- 
Julian Field MEng CEng CITP MBCS MIEEE MACM

'Find a place inside where there's joy, and the joy will burn out
 the pain.' - Joseph Campbell

<a class="moz-txt-link-abbreviated" href="http://www.Zend.To">www.Zend.To</a>
Twitter: @JulesFM
</pre>
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