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@ -76,6 +76,18 @@ However, if you still want to disable it, you can do so with the `web-root: disa
Think of the ntfy web app like an Android/iOS app. It is freely available and accessible to anyone, yet useless without Think of the ntfy web app like an Android/iOS app. It is freely available and accessible to anyone, yet useless without
a proper backend. So as long as you secure your backend with ACLs, exposing the ntfy web app to the Internet is harmless. a proper backend. So as long as you secure your backend with ACLs, exposing the ntfy web app to the Internet is harmless.
## If topic names are public, could I not just brute force them?
If you don't have [ACLs set up](config.md#access-control), the topic name is your password, it says so everywhere. If you
choose a easy-to-guess/dumb topic name, people will be able to guess it. If you choose a randomly generated topic name,
the topic is as good as a good password.
As for brute forcing: It's not possible to brute force a ntfy server for very long, as you'll get quickly rate limited.
In the default configuration, you'll be able to do 60 requests as a burst, and then 1 request per 10 seconds. Assuming you
choose a random 10 digit topic name using only A-Z, a-z, 0-9, _ and -, there are 64^10 possible topic names. Even if you
could do hundreds of requests per seconds (which you cannot), it would take many years to brute force a topic name.
For ntfy.sh, there's even a fail2ban in place which will ban your IP pretty quickly.
## Where can I donate? ## Where can I donate?
I have just very recently started accepting donations via [GitHub Sponsors](https://github.com/sponsors/binwiederhier). I have just very recently started accepting donations via [GitHub Sponsors](https://github.com/sponsors/binwiederhier).
I would be humbled if you helped me carry the server and developer account costs. Even small donations are very much I would be humbled if you helped me carry the server and developer account costs. Even small donations are very much