<div dir="ltr">Technically or legally?<div><br></div><div>How does one stop a DoS attack on a network?  Or on anything for that matter?  Say you were attending a protest, and <a href="https://youtu.be/cvAMkDGKelQ?t=80">someone is blowing an air horn in your ear</a>?  What can you do?</div><div><br></div><div>Technically, you could front end the whole thing with a captcha style gate, so you could ask to push a single button, button combination, or solve a simple addition problem resulting in two digits.  granted, just like on the web, a captcha is burdensome to the user, but generally, it's preferable over the site being down, or disrupted.</div><div><br></div><div>CUC and UCCX both could handle this task, though it would be easier in UCCX.</div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Apr 16, 2018 at 9:49 AM Matthew Loraditch <<a href="mailto:MLoraditch@heliontechnologies.com">MLoraditch@heliontechnologies.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





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<p class="MsoNormal">So this is a curiosity question, we had a prospective client call us who is essentially getting robocalled to oblivion. Some scammer has robo dialers setup and is flooding all of their trunks. He got a ransom, stopped and then started again.
 He was originally using one number and then when the telco blocked that switching to random sources.<u></u><u></u></p>
<p class="MsoNormal">Are there are any legitimate defenses to this sort of thing?<u></u><u></u></p>
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<div><table cellpadding="0" cellspacing="0" border="0" style="width:100%;font-size:0"><tr><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="font-size:0"><tr><td style="padding:0 10px 0 0"> </td><td align="left" style="padding:10px 0 10px 10px;vertical-align:middle"><table cellpadding="0" cellspacing="0" border="0" style="width:100%;font-size:0"><tr style="font-size:14.67px;color:#f3800b;font-style:normal;font-weight:700;white-space:nowrap"><td align="left" style="vertical-align:top;font-family:Calibri,Arial,sans-serif">Matthew Loraditch<span style="font-family:remialcxesans">​</span></td></tr><tr><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="font-size:14.67px;color:#808080;font-style:normal;font-weight:700;white-space:nowrap"><tr><td align="left" style="vertical-align:top;font-family:Calibri,Arial,sans-serif">Sr. Network Engineer</td></tr></table></td></tr><tr><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="font-size:0"><tr><td align="left" style="padding:10px 0 0;vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="font-size:14.67px;color:#808080;font-style:normal;font-weight:400;white-space:nowrap"><tr><td align="left" style="vertical-align:top;font-family:Calibri,Arial,sans-serif"><span style="color:#f3800b">p:</span> <a href="tel:443.541.1518" id="m_8630719865754711579LPlnk689713" style="text-decoration:none;color:#808080" target="_blank"><strong style="font-weight:400">443.541.1518</strong></a></td></tr></table></td></tr></table></td></tr><tr><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="font-size:14.67px;color:#808080;font-style:normal;font-weight:400;white-space:nowrap"><tr><td align="left" style="vertical-align:top;font-family:Calibri,Arial,sans-serif"><span style="color:#f3800b">w:</span> <a href="http://www.heliontechnologies.com/" id="m_8630719865754711579LPlnk689713" style="text-decoration:none;color:#808080" target="_blank"><strong style="font-weight:400">www.heliontechnologies.com</strong></a></td><td align="left" style="vertical-align:top;font-family:Calibri,Arial,sans-serif"> | </td><td align="left" style="vertical-align:top;font-family:Calibri,Arial,sans-serif"><span style="color:#f3800b">e:</span> <a href="mailto:MLoraditch@heliontechnologies.com" id="m_8630719865754711579LPlnk689713" style="text-decoration:none;color:#808080" target="_blank"><strong style="font-weight:400">MLoraditch@heliontechnologies.com</strong></a></td></tr></table></td></tr><tr><td align="left" style="vertical-align:middle"><table cellpadding="0" cellspacing="0" border="0" style="font-size:0;line-height:normal"><tr><td align="left" style="vertical-align:bottom"><img src="cid:image164818.png@93BA584B.3B5FAD34" width="400" height="68" border="0" alt="" style="width:400px;min-width:400px;max-width:400px;height:68px;min-height:68px;max-height:68px;font-size:0"></td></tr></table></td></tr><tr><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="font-size:0"><tr><td align="left" style="padding:10px 0 0;vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="font-size:0"><tr><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="width:100%;font-size:0;line-height:normal"><tr><td align="center" style="padding:0 3px 0 0;vertical-align:top"><a href="https://facebook.com/heliontech" id="m_8630719865754711579LPlnk689713" style="text-decoration:none" target="_blank"><img src="cid:image955318.png@CDDA0725.CCC32B2A" width="18" height="18" border="0" title="Facebook" alt="Facebook" style="width:18px;min-width:18px;max-width:18px;height:18px;min-height:18px;max-height:18px;font-size:12px"></a></td></tr></table></td><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="width:100%;font-size:0;line-height:normal"><tr><td align="center" style="padding:0 3px 0 0;vertical-align:top"><a href="https://twitter.com/heliontech" id="m_8630719865754711579LPlnk689713" style="text-decoration:none" target="_blank"><img src="cid:image614350.png@3AAA8867.EB178A54" width="18" height="18" border="0" title="Twitter" alt="Twitter" style="width:18px;min-width:18px;max-width:18px;height:18px;min-height:18px;max-height:18px;font-size:12px"></a></td></tr></table></td><td align="left" style="vertical-align:top"><table cellpadding="0" cellspacing="0" border="0" style="width:100%;font-size:0;line-height:normal"><tr><td align="center" style="padding:0 3px 0 0;vertical-align:top"><a href="https://www.linkedin.com/company/helion-technologies" id="m_8630719865754711579LPlnk689713" style="text-decoration:none" target="_blank"><img src="cid:image165691.png@C67AFB48.5DA18F00" width="18" height="18" border="0" title="LinkedIn" alt="LinkedIn" style="width:18px;min-width:18px;max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