# Input UDP/ netflow no listenning

**URL:** <https://discuss.elastic.co/t/input-udp-netflow-no-listenning/79600>\
**Category:** Logstash\
**Created:** [March 22, 2017, 2:40pm UTC](https://discuss.elastic.co/t/input-udp-netflow-no-listenning/79600 "2017-03-22T14:40:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pierre1](https://avatars.discourse-cdn.com/v4/letter/p/a8b319/32.png) [@pierre1](https://discuss.elastic.co/u/pierre1)\
**Post date:** [March 22, 2017, 2:40pm UTC](https://discuss.elastic.co/t/input-udp-netflow-no-listenning/79600/1 "2017-03-22T14:40:22Z")

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hey,

i have a problem with UDP

this is my configuration :

```
input {
  udp {
    port => 2055
    type => "Netflow"
    codec => netflow {
      versions => [9]
    }
  }
}

output {
    if ( [type] == "Netflow" ) {
        elasticsearch {
                hosts => ["localhost:9200"]
                index => "netflow-%{+YYYY.MM.dd}"
          }
    }     
}

```

when i run tcpdump i can see my flow comming  
with netstat i can't see the port on listenning so i run logstash in debug and i see this :

```
15:34:34.448 [[main]<udp] INFO logstash.inputs.udp - Starting UDP listener {:address=>"0.0.0.0:2055"}
15:34:34.450 [[main]<udp] WARN logstash.inputs.udp - UDP listener died {:exception=>#<SocketError: bind: name or service not known>, :backtrace=>["org/jruby/ext/socket/RubyUDPSocket.java:160:in `bind'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-3.1.0/lib/logstash/inputs/udp.rb:82:in `udp_listener'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-3.1.0/lib/logstash/inputs/udp.rb:56:in `run'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:365:in `inputworker'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:359:in `start_input'"]}

```

plz help me 🙂

---

<div class="post-metadata">

**Author:** ![pierre1](https://avatars.discourse-cdn.com/v4/letter/p/a8b319/32.png) [@pierre1](https://discuss.elastic.co/u/pierre1)\
**Post date:** [March 22, 2017, 10:09pm UTC](https://discuss.elastic.co/t/input-udp-netflow-no-listenning/79600/2 "2017-03-22T22:09:45Z")

</div>

Up !  
Help plz

---

<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:** [April 19, 2017, 10:09pm UTC](https://discuss.elastic.co/t/input-udp-netflow-no-listenning/79600/3 "2017-04-19T22:09:45Z")

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