Are the various multiplier settings documented somewhere?

Examples would be very welcome too. Isn’t that what this list is for? :)


> On 30 Mar 2018, at 14:46, Tony Collins <t...@evilplan.org.uk> wrote:
> 
> Hi!
> 
> It's really configurable: there's a basic on/off setting, but you can also 
> tell it how much to increase by each time, and you can set either simple or 
> aggressive formulae.
> 
> This is one of the settings for the multiplier:
> 
> bantime.multipliers = 1 2 16 90 182 365 1000 2000
> 
> That shows how aggressively it will increase the bantime. In example above, 
> my bantime of 86400 (1 day) will ban a persistent offender for 1 day, 2 days, 
> 16 days etc. You can configure it in a really granular way if you manipulate 
> the ban time with the multiplier.
> 
> In terms of purging, yes I'm talking about dbpurgeage. Until 0.10 or 0.11 
> that setting didn't actually do anything. No function was ever written to 
> purge the DB.
> 
> Now it works; it does purge after dbpurgeage. So I set my purge age to 2 
> years, so that it remembers long-time bans. But that's because my multiplier 
> eventually bans bad IPa for a year or more.
> 
> The purge age amount depends on what sort of ban times you set.
> 
> If you want to discuss more specific examples, I can show you how I'm using 
> it.
> 
> It's honestly improved f2b by ten times for me - the recidive jail never 
> quite worked for me because it was not very configurable, but now we have an 
> ability to generate longer and longer ban times, so Fail2Ban really feels 
> even more useful.
> 
> Tony 
> 
> On Fri, 30 Mar 2018 at 11:31, Palvelin Postmaster via Fail2ban-users 
> <fail2ban-users@lists.sourceforge.net> wrote:
> 
> 
> > On 15 Mar 2018, at 12:00, Tony Collins <t...@evilplan.org.uk> wrote:
> >
> > One other thing: the 0.11.x version of f2b has a ban time "multiplier", 
> > which is just fantastic - if the same IP keeps getting banned, f2b 
> > automatically increases the ban time. To do that you need a long 'purgeage' 
> > setting (so it can remember that an IP was banned a few months ago), and 
> > again once you use f2b to manage your blocks, it can just take care of 
> > everything - you never need to use iptables commands for unblocking, 
> > because f2b 0.11.x manages ban times so much more effectively and 
> > logically. F2b has always managed bans and unbans pretty well, but there's 
> > been some really excellent polish applied to recent versions.
> 
> Is the ’multiplier’ applied automatically or is there a setting?
> 
> I presumw by ’purgeable’ you refer the dbpurgeage setting. Where should one 
> ideally set it in regards to the new automatically increasing ban time?
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