When Skype was still in common use, this was a very known issue. I’m in lots of gaming communities, and you had to be careful about who knew your username because you could have your IP exposed then get DDoS.

Possibly they patched it and this is a new instance of this, but it was like this for years and years before.

Veeam backup and replication at home and at work. At home a copy goes to a NAS, another copy goes to backblaze b2 currently.