# UDP Input - Get host - how?

**URL:** <https://discuss.elastic.co/t/udp-input-get-host-how/249458>\
**Category:** Logstash\
**Created:** [September 22, 2020, 7:07am UTC](https://discuss.elastic.co/t/udp-input-get-host-how/249458 "2020-09-22T07:07:17Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![diecode](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@diecode](https://discuss.elastic.co/u/diecode)\
**Post date:** [September 22, 2020, 7:07am UTC](https://discuss.elastic.co/t/udp-input-get-host-how/249458/1 "2020-09-22T07:07:17Z")

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Hey,

How can I get the sender IP in UDP Input? I would like create an if expression for set type. I tried this, but it is not working:

```auto
    input {
       udp {
          port => 1514

          if [host] == "1.1.1.1" {
             type => "example"
          }
       }
    }

```

Thanks!

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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:** [September 22, 2020, 2:50pm UTC](https://discuss.elastic.co/t/udp-input-get-host-how/249458/2 "2020-09-22T14:50:11Z")

</div>

You cannot use a conditional inside a input like that. You would have to do it in a filter section using mutate+add\_field.

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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:** [October 20, 2020, 2:50pm UTC](https://discuss.elastic.co/t/udp-input-get-host-how/249458/3 "2020-10-20T14:50:17Z")

</div>

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