It's a scam, beware. Known as the eventviewer scam.

Caller: Not sure - says it is John from Telstra with thick Indian accent

Demands quite rudely to speak to owner of internet connection

called claiming to be from telstra asking to speak to the owner of the internet connection saying claiming the account had been hacked

Caller: Jenny smith

Telstra security section called tonight told me that my internet was compromised and that I had to have a look at my modem to check this number. Told her that I wasn’t with Telstra so why would Telstra be calling wouldn’t listen hung up and she rang back again told her I was going to report her and I wanted a call back number if Telstra. Wasn’t bale to give me

I’ve had two calls from this number in the last few hours. The last one at 12:15 am.

I don’t answer.

Keps phoning each night and goes through the answering machine but leaves no message, Shall continue to ignore.

says goodbye!

This number calls us at least 3 - 4 times a day (in the evening).
When we try to answer the call drops off

Caller said they were from Telstra and someone was hacking my computer. Was rude and said they were looking after the security of my account. Hung up when I asked what email address he was referring to. My home number is also unlisted.

Keeps ringing each night. No one answers and calling the number back doesn't work