# Tags filed added by logstash

**URL:** <https://discuss.elastic.co/t/tags-filed-added-by-logstash/67531>\
**Category:** Logstash\
**Created:** [November 29, 2016, 6:08pm UTC](https://discuss.elastic.co/t/tags-filed-added-by-logstash/67531 "2016-11-29T18:08:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![agrm](https://avatars.discourse-cdn.com/v4/letter/a/9dc877/32.png) [@agrm](https://discuss.elastic.co/u/agrm)\
**Post date:** [November 29, 2016, 6:08pm UTC](https://discuss.elastic.co/t/tags-filed-added-by-logstash/67531/1 "2016-11-29T18:08:35Z")

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I set a UDP listener in logstash pipe to get packet from a specific port. The packets are in JSON format.

When I perform formatting on received packets, Logstash adds additional field (e.g. @timestamp, @version, tags, ...). I remove them using mutate plugin using remove\_field. It removes all addition fields, except tags.

I tested almost everything. I event installed a fresh new version of logstash. But I am still having issue with it.

Would you please help me regarding it?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 27, 2016, 6:08pm UTC](https://discuss.elastic.co/t/tags-filed-added-by-logstash/67531/2 "2016-12-27T18:08:37Z")

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