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While telecom companies such as Telstra are required to limit outbound calls from their SIP Trunks (ensuring you own the number you're trying to present), there are "IT" companies which offer SIP trunks without being a telco, this means they do not have to
follow the same guidelines.</div>
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Just 2 days ago I became aware of a scammer presenting a school's main number on outbound calls, being part of the team supporting the schools phone system I can guarantee the system wasn't hacked at all.</div>
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There was no traffic from the school's phone system to Telstra during the time of the scam calls, however plenty of angry people were calling back yelling at the admin staff.</div>
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so basically yes, a VoIP seller (yet not an official telco) putting zero security on the calling number.</div>
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Cheers,</div>
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Tim</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> AusNOG <ausnog-bounces@lists.ausnog.net> on behalf of Darren Moss <Darren.Moss@cloud365.com.au><br>
<b>Sent:</b> Thursday, 18 February 2021 3:45 PM<br>
<b>To:</b> Bradley Amm <brad@bradleyamm.com>; AusNOG Mailing List <ausnog@ausnog.net><br>
<b>Subject:</b> Re: [AusNOG] "Telstra" scammers</font>
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<span style="color:#1F497D">How are they making calls into AU mobile networks ?</span></p>
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<span style="color:#1F497D"> </span></p>
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<span style="color:#1F497D">Surely they need a SIP service as a starting point.</span></p>
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<span style="color:#1F497D"> </span></p>
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<span style="color:#1F497D">Is it a VoIP seller not performing checks ??</span></p>
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<span style="color:#1F497D"> </span></p>
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<span style="color:#1F497D">Darren.</span></p>
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<span style="color:#1F497D"> </span></p>
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<span style="color:#1F497D"> </span></p>
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<b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> AusNOG [mailto:ausnog-bounces@lists.ausnog.net]
<b>On Behalf Of </b>Bradley Amm<br>
<b>Sent:</b> Thursday, 18 February 2021 3:42 PM<br>
<b>To:</b> ausnog@ausnog.net<br>
<b>Subject:</b> Re: [AusNOG] "Telstra" scammers</span></p>
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<span style="">Unfortunately not a lot can be done</span></p>
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<span style="">I had a similar call today. Just blocked the numbers.</span></p>
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<span style="">Probably a spoofed number as well</span></p>
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<span style=""> </span></p>
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<b><span lang="EN-US">From:</span></b><span lang="EN-US"> AusNOG <ausnog-bounces@lists.ausnog.net>
<b>On Behalf Of </b>Kai<br>
<b>Sent:</b> Thursday, 18 February 2021 12:34 PM<br>
<b>To:</b> ausnog@ausnog.net<br>
<b>Subject:</b> [AusNOG] "Telstra" scammers</span></p>
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Just had a scam call from a female operator, called from "<a href="tel:0432%20594%20523">0432 594 523</a>" (probably a spoofed number), says her name is Selina from Telstra, that my modem has a virus. She gave her Telstra staff ID as C0527 (that's not a real
Telstra staff ID, it starts with a 0 and it's too short) and hung up when I asked what her Team Leader or Manager's name and staff ID is.<br>
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So the "Telstra scammers" are still out there, trying to scam people.<br>
Parasites.</p>
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<span style="font-size:9.5pt; color:#575757">Sent from my smartphone.</span></p>
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