<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">I’m sure you’ve already considered this, but I wonder, with everything being back-hauled over IP these days, if their telco would be able to identify the IXC who is handing off the call to them, based on the logs for the original calling party number they blocked, and blacklist that address. Sure that sounds extreme (voice is more critical them SMTP), but you’re also talking about criminal activity.<br><br><div id="AppleMailSignature"><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Helvetica;"><span style="font-size: 12pt;">Sent from an iOS device with very tiny touchscreen input keys. Please excude my typtos.</span></p></div><div><br>On Apr 16, 2018, at 10:23 AM, Anthony Holloway <<a href="mailto:avholloway+cisco-voip@gmail.com">avholloway+cisco-voip@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><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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