# Log4j input host without port

**URL:** <https://discuss.elastic.co/t/log4j-input-host-without-port/43105>\
**Category:** Logstash\
**Created:** [March 1, 2016, 10:58am UTC](https://discuss.elastic.co/t/log4j-input-host-without-port/43105 "2016-03-01T10:58:59Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![David\_Pocivalnik](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/david_pocivalnik/32/56098_2.png) [@David\_Pocivalnik](https://discuss.elastic.co/u/David_Pocivalnik)\
**Post date:** [March 1, 2016, 10:58am UTC](https://discuss.elastic.co/t/log4j-input-host-without-port/43105/1 "2016-03-01T10:58:59Z")

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I'm using log4j input to ES with a `SocketAppender`.

I'm looking for a way to remove the `port`-portion of the `host`-field, or add another field with only containing the host/IP of that `host` field.

Is there an easy way to accomplish one of the two options?

I found an old issue (dating back to Feb 2014) [https://logstash.jira.com/browse/LOGSTASH-1914](https://logstash.jira.com/browse/LOGSTASH-1914)

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**Author:** ![David\_Pocivalnik](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/david_pocivalnik/32/56098_2.png) [@David\_Pocivalnik](https://discuss.elastic.co/u/David_Pocivalnik)\
**Post date:** [March 2, 2016, 8:12am UTC](https://discuss.elastic.co/t/log4j-input-host-without-port/43105/2 "2016-03-02T08:12:55Z")

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I looked into the filters and found a way by using the mutate filter

> filter {  
> mutate {  
> split =\> { "host" =\> ":" }  
> add\_field =\> { "hostIp" =\> "%{[host][0]}" }  
> add\_field =\> { "hostPort" =\> "%{[host][1]}" }  
> }  
> }

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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/log4j-input-host-without-port/43105/3 "2017-07-06T05:08:52Z")

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Closed on July 6, 2017, 5:08am UTC