Is there is a way to scrub the x-forwarded-for field in message in logstash before sending it to logz.
Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) cs(Referer) sc-status sc-substatus sc-win32-status sc-bytes cs-bytes time-taken X-Forwarded-For