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Re: Blocking tens of thousands of IP's

Maxim Dounin
November 02, 2016 08:58AM
Hello!

On Tue, Nov 01, 2016 at 05:37:59PM -0400, CJ Ess wrote:

> I don't think managing large lists of IPs is nginx's strength - as far as I
> can tell all of its ACLs are arrays that have the be iterated through on
> each request.
>
> When I do have to manage IP lists in Nginx I try to compress the lists into
> the most compact CIDR representation so there is less to search. Here is a
> perl snippet I use to do that (handles ipv4 and ipv6):

Yes, the "allow" / "deny" directives do sequential scan of address
blocks specified, and this may not be very efficient when working
with large sets of IPs.

For large lists of IPs it's usually better idea to use the geo
module, combined with if/return:

geo $blocked {
defaul 0;
192.2.0.0/16 1;
...
}

if ($blocked) {
return 403;
}

Documentation is here:
http://nginx.org/en/docs/http/ngx_http_geo_module.html

--
Maxim Dounin
http://nginx.org/

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Subject Author Posted

Blocking tens of thousands of IP's

Cox, Eric S November 01, 2016 11:18AM

Re: Blocking tens of thousands of IP's

CJ Ess November 01, 2016 05:40PM

Re: Blocking tens of thousands of IP's

jeffdyke November 01, 2016 05:48PM

RE: Blocking tens of thousands of IP's

Cox, Eric S November 01, 2016 05:50PM

Re: Blocking tens of thousands of IP's

Lucas Rolff November 01, 2016 05:54PM

Re: Blocking tens of thousands of IP's

mex November 04, 2016 05:37AM

Re: Blocking tens of thousands of IP's

Rainer Duffner November 01, 2016 05:52PM

RE: Blocking tens of thousands of IP's

Cox, Eric S November 01, 2016 06:36PM

Re: Blocking tens of thousands of IP's

Rainer Duffner November 01, 2016 06:42PM

RE: Blocking tens of thousands of IP's

Cox, Eric S November 01, 2016 06:44PM

Re: Blocking tens of thousands of IP's

Rainer Duffner November 01, 2016 06:56PM

RE: Blocking tens of thousands of IP's

Cox, Eric S November 01, 2016 06:58PM

Re: Blocking tens of thousands of IP's

gariac November 01, 2016 07:00PM

Re: Blocking tens of thousands of IP's

Tom Thorogood November 01, 2016 07:06PM

Re: Blocking tens of thousands of IP's

gariac November 01, 2016 06:48PM

Re: RE: Blocking tens of thousands of IP's

mex November 04, 2016 05:43AM

Re: Blocking tens of thousands of IP's

Jonathan Vanasco November 08, 2016 01:30PM

Re: Blocking tens of thousands of IP's

mayak November 08, 2016 06:00PM

Re: Blocking tens of thousands of IP's

mex November 15, 2016 01:09AM

Re: Blocking tens of thousands of IP's

gariac November 08, 2016 06:16PM

Re: Blocking tens of thousands of IP's

CJ Ess November 18, 2016 02:46PM

Re: Blocking tens of thousands of IP's

Maxim Dounin November 02, 2016 08:58AM

Re: Blocking tens of thousands of IP's

gariac November 01, 2016 06:28PM

Re: Blocking tens of thousands of IP's

Francis Daly November 03, 2016 03:02PM

Re: Blocking tens of thousands of IP's

noci November 23, 2016 09:33AM



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