# Logstash/ElasticSearch/Kibana 7.3 not working for Netflow

**URL:** <https://discuss.elastic.co/t/logstash-elasticsearch-kibana-7-3-not-working-for-netflow/194829>\
**Category:** Logstash\
**Created:** [August 12, 2019, 10:40am UTC](https://discuss.elastic.co/t/logstash-elasticsearch-kibana-7-3-not-working-for-netflow/194829 "2019-08-12T10:40:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Elena\_Kaidrikov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/elena_kaidrikov/32/52093_2.png) [@Elena\_Kaidrikov](https://discuss.elastic.co/u/Elena_Kaidrikov)\
**Post date:** [August 12, 2019, 10:40am UTC](https://discuss.elastic.co/t/logstash-elasticsearch-kibana-7-3-not-working-for-netflow/194829/1 "2019-08-12T10:40:38Z")

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Hi,  
I installed Logstash, ElasticSearch, Kibana, and ElasticFlow

my logstash config :

output {  
elasticsearch {  
hosts =\> ["localhost:9200"]  
manage\_template =\> false  
index =\> "%{[@metadata][netflow]}-%{[@metadata][version]}-%{+YYYY.MM.dd}"  
}  
}

input {  
udp {  
host =\> "192.168.100.1"  
port =\> 2055  
codec =\> netflow  
}  
}

the first question is Why logstash is listening on 0.0.0.0:2055 :  
udp 0 0.0.0.0:2055 0.0.0.0:\* 13798/java

from /var/log/logstash/logstash-plain.log :

UDP listener started {:address=\>" **0.0.0.0:2055**", :receive\_buffer\_bytes=\>"212992", :queue\_size=\>"2000"}

And my main issue is I don't see the netflow traffic in Kibana Dashboard  
I've verified that the netflow packages are riched the host. I checked it using tcpdump and simple udp socket app.

Where does Logstash/ElasticSearch collect received data?  
Will I need to change/add/fix something?

Thank you for your help

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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:** [August 12, 2019, 12:46pm UTC](https://discuss.elastic.co/t/logstash-elasticsearch-kibana-7-3-not-working-for-netflow/194829/2 "2019-08-12T12:46:14Z")

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> [@Elena\_Kaidrikov](#):
>
> UDP listener started {:address=\>" **0.0.0.0:2055**", :receive\_buffer\_bytes=\>"212992", :queue\_size=\>"2000"}

The UDP listener [logs](https://github.com/logstash-plugins/logstash-input-udp/blob/9f6e64f1fa970021e22b087374bfa97be8eaf17b/lib/logstash/inputs/udp.rb#L117) whatever the host option is set to, so I do not think you are running with the configuration you think you are.

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<div class="post-metadata">

**Author:** ![Elena\_Kaidrikov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/elena_kaidrikov/32/52093_2.png) [@Elena\_Kaidrikov](https://discuss.elastic.co/u/Elena_Kaidrikov)\
**Post date:** [August 13, 2019, 1:05pm UTC](https://discuss.elastic.co/t/logstash-elasticsearch-kibana-7-3-not-working-for-netflow/194829/3 "2019-08-13T13:05:31Z")

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I succeeded to configure and I see that logstash receives my netflow packages,  
but it drops them.  
I see the following prints in the logstash log :

[2019-08-13T12:32:47,900][WARN][logstash.codecs.netflow] Received template 256 of size 63 bytes doesn't match BinData representation we built (65 bytes)

[2019-08-13T12:32:47,907][WARN][logstash.codecs.netflow] Template length exceeds flowset length, skipping {:template\_id=\>256, :template\_length=\>65, :record\_length=\>63}

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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:** [September 10, 2019, 1:05pm UTC](https://discuss.elastic.co/t/logstash-elasticsearch-kibana-7-3-not-working-for-netflow/194829/4 "2019-09-10T13:05:41Z")

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