# \[SOLVED\] Drop when a field is equal to

**URL:** <https://discuss.elastic.co/t/solved-drop-when-a-field-is-equal-to/54003>\
**Category:** Logstash\
**Created:** [June 27, 2016, 7:40am UTC](https://discuss.elastic.co/t/solved-drop-when-a-field-is-equal-to/54003 "2016-06-27T07:40:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Alex\_Lum](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alex_lum/32/84472_2.png) [@Alex\_Lum](https://discuss.elastic.co/u/Alex_Lum)\
**Post date:** [June 27, 2016, 7:40am UTC](https://discuss.elastic.co/t/solved-drop-when-a-field-is-equal-to/54003/1 "2016-06-27T07:40:16Z")

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Hello all.  
A new question, i need to drop lines when a fieldname is equal to something.

example :  
Jun 27 09:27:37 10.0.6.1 date=2016-06-27 time=09:27:37 logid=0000000013 type=traffic subtype=forward level=notice dstintf="dmz" poluuid=e7a26648-eda7-51e4-5b13-a447d7d36689 sessionid=97003569 proto=6 action=close policyid=110 policytype=policy dstcountry="Reserved" srccountry="Reserved" trandisp=noop duration=2 sentbyte=1383 rcvdbyte=4979 sentpkt=8 rcvdpkt=9 appcat="unscanned"

if dstinf="dmz" then drop

how can i make that?  
Thanks.

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**Author:** ![mourlos](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mourlos/32/10788_2.png) [@mourlos](https://discuss.elastic.co/u/mourlos)\
**Post date:** [June 27, 2016, 7:45am UTC](https://discuss.elastic.co/t/solved-drop-when-a-field-is-equal-to/54003/2 "2016-06-27T07:45:40Z")

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Hi,

Assuming that you already use a filter to break down each field, you can use something like this:

[CODE]  
filter {

# Drop specific events

if [dstinf] == "dmz" {  
drop { }  
}  
}  
[/CODE]

Hope it helps. (In case you use it, make sure that the fields and values are the correct ones)

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<div class="post-metadata">

**Author:** ![Alex\_Lum](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alex_lum/32/84472_2.png) [@Alex\_Lum](https://discuss.elastic.co/u/Alex_Lum)\
**Post date:** [June 27, 2016, 8:12am UTC](https://discuss.elastic.co/t/solved-drop-when-a-field-is-equal-to/54003/3 "2016-06-27T08:12:36Z")

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Thak you very much.  
It works.  
topic closed.

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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, 4:50am UTC](https://discuss.elastic.co/t/solved-drop-when-a-field-is-equal-to/54003/4 "2017-07-06T04:50:50Z")

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