I can't stress this enough, keep your private and enterprise cloud behind a vpn. Especially if you are a part time Admin with limited resources. Sooner or later you will be hacked.

Pretty sure thats not a limitation of aria2. What system are you using? There a multiple options:

1. Just build a queue
2. Check if aria2 locks up because of system limitations. Max open files, max concurrent connections (there will be a practical limit no matter what you do)
3. build a queue with a cluster to overcome such limitations

I guess you do not mean it seriously? It's funny but most certainly a coincidence.

Everybody gets these Notifications, including my grandma who does not even know how to Google ;).