Caller pretended to be from Telstra and advised that my IP address has been compromised. That it's running on public network instead of private network. Wanted me to check some setting and guide me to fix the issue. Hung up when I said I'm not with Telstra and not account holder.

Scam caller

I sent the call to voicemail. No message left. I have no doubt it's some scammer.

I didn't answer the call. No voicemail left.

Phone rang, I answered, said hello a couple of times, no reply and then caller hung up.
Looked number up on reverse and then blocked it.