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.
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. 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. so basically yes, a VoIP seller (yet not an official telco) putting zero security on the calling number. Cheers, Tim ________________________________ From: AusNOG <[email protected]> on behalf of Darren Moss <[email protected]> Sent: Thursday, 18 February 2021 3:45 PM To: Bradley Amm <[email protected]>; AusNOG Mailing List <[email protected]> Subject: Re: [AusNOG] "Telstra" scammers How are they making calls into AU mobile networks ? Surely they need a SIP service as a starting point. Is it a VoIP seller not performing checks ?? Darren. From: AusNOG [mailto:[email protected]] On Behalf Of Bradley Amm Sent: Thursday, 18 February 2021 3:42 PM To: [email protected] Subject: Re: [AusNOG] "Telstra" scammers Unfortunately not a lot can be done I had a similar call today. Just blocked the numbers. Probably a spoofed number as well From: AusNOG <[email protected]> On Behalf Of Kai Sent: Thursday, 18 February 2021 12:34 PM To: [email protected] Subject: [AusNOG] "Telstra" scammers Just had a scam call from a female operator, called from "0432 594 523<tel:0432%20594%20523>" (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. So the "Telstra scammers" are still out there, trying to scam people. Parasites. Sent from my smartphone.
_______________________________________________ AusNOG mailing list [email protected] http://lists.ausnog.net/mailman/listinfo/ausnog
