# Logstash UDP output

**URL:** <https://discuss.elastic.co/t/logstash-udp-output/43219>\
**Category:** Logstash\
**Created:** [March 2, 2016, 9:51am UTC](https://discuss.elastic.co/t/logstash-udp-output/43219 "2016-03-02T09:51:36Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![apoc](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@apoc](https://discuss.elastic.co/u/apoc)\
**Post date:** [March 2, 2016, 9:51am UTC](https://discuss.elastic.co/t/logstash-udp-output/43219/1 "2016-03-02T09:51:36Z")

</div>

Hello,

Is it possible to send only the message by UDP (output). If i remove the host field for example, i get %{host} instead 😞

Here is my conf :

```
input {
  udp {
    port => 3000
    codec => plain
  }
}
filter {
   mutate {
     remove_field => ["host", "@version"]
   }
}
output {
   stdout {codec => json}
   udp {
     host => localhost
     port => 3001
     codec => "plain"
   }
}

```

If I send a message :  
`echo -n “Hello” | nc -4u -w1 localhost 3000`

I get from the server :

> 2016-03-02T09:27:16.878Z %{host} “Hello”

I just want the message :

> "Hello"

Thank you for your help,

Jeremy

---

<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [March 2, 2016, 2:34pm UTC](https://discuss.elastic.co/t/logstash-udp-output/43219/2 "2016-03-02T14:34:55Z")

</div>

This should do it:

```auto
udp {
  host => "localhost"
  port => 3001
  codec => plain {
    format => "%{message}"
  }
}

```

---

<div class="post-metadata">

**Author:** ![apoc](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@apoc](https://discuss.elastic.co/u/apoc)\
**Post date:** [March 2, 2016, 3:48pm UTC](https://discuss.elastic.co/t/logstash-udp-output/43219/3 "2016-03-02T15:48:05Z")

</div>

works fine 🙂

thank you Magnus

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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:** [July 6, 2017, 5:08am UTC](https://discuss.elastic.co/t/logstash-udp-output/43219/4 "2017-07-06T05:08:46Z")

</div>