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221 posts

Master Geek


Topic # 89305 30-Aug-2011 16:23
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Hi,

Just had a call in which my phones caller ID displayed Operator 216 with the phone number 039292505. I answered, no response and 2 seconds later it hung up.

Checking through the past few days caller ID records on the phone there was another call yesterday from the same number (roughly the same time), however it was labelled as Operator 221. There was also one from Operator 220 the day before (in the morning this time).

I tried calling the number back, but got a 'number not in service' message.

Anyone know who or what this is???

I'm on a 2Talk number, but not sure if that's relevant... 

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xpd

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  Reply # 513990 30-Aug-2011 16:28
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XPD / Gavin / DemiseNZ

 

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  Reply # 514120 30-Aug-2011 22:07
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its quite possibly a VoIP hack attempt if it came through a sip channel. are you open to SIP connections from anyone, or just from the 2talk addresses?




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221 posts

Master Geek


  Reply # 514191 31-Aug-2011 08:12
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Regs: its quite possibly a VoIP hack attempt if it came through a sip channel. are you open to SIP connections from anyone, or just from the 2talk addresses?


I receive calls from anyone if thats what you mean?

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  Reply # 514207 31-Aug-2011 08:50
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Why bother? If it comes from an unknown number in an unknown country, just ignore it.

Either a hack attempt or one of those scam calls where the guy will try and convince your PC is infected and you have to pay them to "clean" it.

Drop it.






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Master Geek


  Reply # 514225 31-Aug-2011 09:15
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freitasm: Why bother? If it comes from an unknown number in an unknown country, just ignore it.

Either a hack attempt or one of those scam calls where the guy will try and convince your PC is infected and you have to pay them to "clean" it.

Drop it.


No worries - just wasn't sure if it was some kind of hack attempt whether the phone is answered or not and whether there is any preventative measures I can take to stop it.

WAF is a bit down, so anything to to keep it up lets me get toys Wink 

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  Reply # 514547 31-Aug-2011 15:54
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I think Regs means that if your phone is open to receive calls from any IP address then its more vulnerable to a hacking attempt, as opposed to only allowing calls that come through the 2talk proxy. Also check that you don't have any IVR function running where hackers might be able to enter a simple PIN and divert their call.




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  Reply # 514569 31-Aug-2011 16:29
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If you have port forwarding enabled and run an ATA such as a SPA2102 anybody can SIP URI call your device if you don't have the source IP restriction enabled. Last time I checked however enabling this blocked 2talk and iTalk from working (lots of people complained when I enabled it on my SPA config file).

I've heard of lots of people finding their phone ringing at random times or picking it up with a fully CID to hear nobody there - these are all bots out there scanning for insecure SIP devices, typically SIP proxies (ie a PBX) so they can make free calls.

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