# What does "auth" =\> "-" mean?

**URL:** <https://discuss.elastic.co/t/what-does-auth-mean/168723>\
**Category:** Logstash\
**Created:** [February 17, 2019, 10:10am UTC](https://discuss.elastic.co/t/what-does-auth-mean/168723 "2019-02-17T10:10:21Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![li\_jessen2016](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/li_jessen2016/32/38817_2.png) [@li\_jessen2016](https://discuss.elastic.co/u/li_jessen2016)\
**Post date:** [February 17, 2019, 10:10am UTC](https://discuss.elastic.co/t/what-does-auth-mean/168723/1 "2019-02-17T10:10:21Z")

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Does it mean the value of the field "auth" is missing, or in other words, not presented in the source message?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [February 17, 2019, 11:07am UTC](https://discuss.elastic.co/t/what-does-auth-mean/168723/2 "2019-02-17T11:07:32Z")

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What sort of message is this from?

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<div class="post-metadata">

**Author:** ![li\_jessen2016](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/li_jessen2016/32/38817_2.png) [@li\_jessen2016](https://discuss.elastic.co/u/li_jessen2016)\
**Post date:** [February 17, 2019, 11:53am UTC](https://discuss.elastic.co/t/what-does-auth-mean/168723/3 "2019-02-17T11:53:34Z")

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Apache log

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [February 17, 2019, 10:44pm UTC](https://discuss.elastic.co/t/what-does-auth-mean/168723/4 "2019-02-17T22:44:56Z")

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I think that means it wasn't present in the request made to apache.

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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:** [March 17, 2019, 10:45pm UTC](https://discuss.elastic.co/t/what-does-auth-mean/168723/5 "2019-03-17T22:45:01Z")

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