Heroku, , Heroku, URL- .
, , Apache Heroku , - .
config.ru:
require 'clogger'
use Clogger, logger: $stdout,
format: %Q|$ip - $remote_user [$time_local] "$request" status $response_length "$http_referer" "$http_user_agent"|
:: , Heroku, AWS, IP- 10/8.
, , : .
: "ip1, ip2" $ip (, / -).
, , , .