Limit IPv4/24 connections

[Valentin V. Bartenev]

On Saturday 14 January 2012 17:27:53 double wrote:
> Hello,
> 
> I would like to limit the connections to 100 per 255.255.255.0
> Is there a chance e.g. to zero the last byte of "$binary_remote_addr"?
> 
> Something like:
> set $remote_addr_24 "/$remote_addr/\.[0-9]*$/.0/"
> limit_zone connectiontrack $remote_addr_24  16m;
> limit_conn connectiontrack 100;
> 

   # this captures only first 3 bytes of $binary_remote_addr:

   if ($binary_remote_addr ~ "^(\C{3})") {
       set $remote_addr_24 $1;
   }


 wbr, Valentin V. Bartenev