# Microsoft DNS - parsing different length of domain name

**URL:** <https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430>\
**Category:** Logstash\
**Created:** [June 30, 2021, 8:48am UTC](https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430 "2021-06-30T08:48:07Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![gmaimbourg](https://avatars.discourse-cdn.com/v4/letter/g/eb9ed0/32.png) [@gmaimbourg](https://discuss.elastic.co/u/gmaimbourg)\
**Post date:** [June 30, 2021, 8:48am UTC](https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430/1 "2021-06-30T08:48:07Z")

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Hello,

I'am working on Microsoft DNS log parsing and i don't know how can i parse different lengh of domain name.  
Here is different examples of what i want to get :  
(2)ui(12)powerreviews(3)com(0) into [ui.powerreviews.com](http://ui.powerreviews.com)  
(6)watson(9)telemetry(9)microsoft(3)com(0) into [watson.telemetry.microsoft.com](http://watson.telemetry.microsoft.com)

As you can see those two ones are 3 and 4 fields long and sometimes i get some 10 fields long domain name and i want my logstash being able to parse every length of domain name.

Thanks.

Gaston Maimbourg,  
cybersecurity apprentice for CD54

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**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [June 30, 2021, 4:27pm UTC](https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430/2 "2021-06-30T16:27:39Z")

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> [@gmaimbourg](#):
>
> i want my logstash being able to parse every length of domain name.

It is unclear what result you want.

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**Author:** ![Iker](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/iker/32/91708_2.png) [@Iker](https://discuss.elastic.co/u/Iker)\
**Post date:** [June 30, 2021, 5:22pm UTC](https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430/3 "2021-06-30T17:22:42Z")

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I have seen that kind of logs, @Badger, he is trying to convert a field with value "(2)ui(12)powerreviews(3)com(0)" into " [ui.powerreviews.com](http://ui.powerreviews.com)"; @gmaimbourg use gsub with a pattern that matches the "(number)" and replace all the ocurrences with dots.

> **[Mutate filter plugin | Logstash Reference \[7.13\] | Elastic](https://www.elastic.co/guide/en/logstash/current/plugins-filters-mutate.html#plugins-filters-mutate-gsub)**

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<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [June 30, 2021, 5:26pm UTC](https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430/4 "2021-06-30T17:26:59Z")

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As Iker says, use mutate+gsub

```
mutate { gsub => ["someField", "\(\d+\)", "."] }
```

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<div class="post-metadata">

**Author:** ![gmaimbourg](https://avatars.discourse-cdn.com/v4/letter/g/eb9ed0/32.png) [@gmaimbourg](https://discuss.elastic.co/u/gmaimbourg)\
**Post date:** [July 5, 2021, 11:45am UTC](https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430/5 "2021-07-05T11:45:32Z")

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Thank you, it works 🙂

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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:** [August 2, 2021, 11:45am UTC](https://discuss.elastic.co/t/microsoft-dns-parsing-different-length-of-domain-name/277430/6 "2021-08-02T11:45:44Z")

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