# Want a Logstash Filter to Parse the Agent Field in Apache Access Log Files

**URL:** <https://discuss.elastic.co/t/want-a-logstash-filter-to-parse-the-agent-field-in-apache-access-log-files/28387>\
**Category:** Logstash\
**Created:** [August 31, 2015, 9:39pm UTC](https://discuss.elastic.co/t/want-a-logstash-filter-to-parse-the-agent-field-in-apache-access-log-files/28387 "2015-08-31T21:39:56Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![bhutchinson](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@bhutchinson](https://discuss.elastic.co/u/bhutchinson)\
**Post date:** [September 1, 2015, 7:38pm UTC](https://discuss.elastic.co/t/want-a-logstash-filter-to-parse-the-agent-field-in-apache-access-log-files/28387/5 "2015-09-01T19:38:18Z")

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Thank you again for your response. I guess I am not understanding how to use the useragent filter. Sorry to ask again. I really want to understand how this filter works.

My Apache Access Logs are using the CombinedApacheFileFormat. One of the fields that is captured is named "agent". How do I use the useragent filter to parse out the browser name from the agent field and put the browser name value inside a new field named "browser-name"?

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_[View the full topic](https://discuss.elastic.co/t/want-a-logstash-filter-to-parse-the-agent-field-in-apache-access-log-files/28387)._