Antony Stone <antony.st...@devuan.open.source.it> wrote:

> The one feature I'd like to see on fail2ban is multi-server communication, so 
> that if one of my machines has a reason to block an address, it tells all my 
> others to block that address as well.

That’s also possible to “roll your own”. I was considering this at my last 
place, but never got round to doing it.
The only hard bit is messaging between machines, but my plan was to send a 
message to the outside router so it could block the address at the perimeter.

One thought I had was to use syslog to send certain messages to the router’s 
syslog so fail2ban could pick them up and apply rules.

Simon

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