# How do I map fields with ECS if I am using my own grok filters

**URL:** <https://discuss.elastic.co/t/how-do-i-map-fields-with-ecs-if-i-am-using-my-own-grok-filters/300147>\
**Category:** Logstash\
**Created:** [March 21, 2022, 3:46am UTC](https://discuss.elastic.co/t/how-do-i-map-fields-with-ecs-if-i-am-using-my-own-grok-filters/300147 "2022-03-21T03:46:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Blason](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/blason/32/42284_2.png) [@Blason](https://discuss.elastic.co/u/Blason)\
**Post date:** [March 21, 2022, 3:46am UTC](https://discuss.elastic.co/t/how-do-i-map-fields-with-ecs-if-i-am-using-my-own-grok-filters/300147/1 "2022-03-21T03:46:36Z")

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Hi Team,

Here is my grok parser

```auto
match => { "message" => "(?<timestamp>%{MONTHDAY}-%{MONTH}-%{YEAR} %{TIME}) rpz: info: client @%{WORD:data} %{IPV4:clientipaddr}#%{INT:sport} \(%{NOTSPA
CE:qdomain}\): rpz QNAME Local-Data rewrite %{NOTSPACE:origdom} via %{NOTSPACE:rewritten}"

```

This is a BIND RPZ and wondering how do I convert those so that they adhere with ECS? Can someone please help?

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 18, 2022, 3:47am UTC](https://discuss.elastic.co/t/how-do-i-map-fields-with-ecs-if-i-am-using-my-own-grok-filters/300147/2 "2022-04-18T03:47:33Z")

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