tcp 플러그인에 예기치 않은 오류가 발생했습니다.

간단한 logstash 구성을 만들었습니다.

tcp.conf

input {
  tcp {
    port => 22
    type => syslog
  }  
}

filter {
  if [type] == "syslog" {
    grok {
      match => { "message" => "%{SYSLOGTIMESTAMP:syslog_timestamp} %{SYSLOGHOST:syslog_hostname} %{DATA:syslog_program}(?:\[%{POSINT:syslog_pid}\])?: %{GREEDYDATA:syslog_message}" }
      add_field => [ "received_at", "%{@timestamp}" ]
      add_field => [ "received_from", "%{host}" ]
    }
    syslog_pri { }
    date {
      match => [ "syslog_timestamp", "MMM  d HH:mm:ss", "MMM dd HH:mm:ss" ]
    }
  }
}

output {
  stdout { codec => rubydebug }
}

구성 실행 :

bin/logstash -f tcp.conf

이 명령 실행 :

telnet localhost 22

이 오류가 발생합니다.

Using milestone 2 input plugin 'tcp'. This plugin should be stable, but if you see strange behavior, please let us know! For more information on plugin milestones, see http://logstash.net/docs/1.4.2/plugin-milestones {:level=>:warn}
Using milestone 1 filter plugin 'syslog_pri'. This plugin should work, but would benefit from use by folks like you. Please let us know if you find bugs or have suggestions on how to improve this plugin.  For more information on plugin milestones, see http://logstash.net/docs/1.4.2/plugin-milestones {:level=>:warn}

+---------------------------------------------------------+
| An unexpected error occurred. This is probably a bug.   |
| You can find help with this problem in a few places:    |
|                                                         |
| * chat: #logstash IRC channel on freenode irc.          |
|     IRC via the web: http://goo.gl/TI4Ro                |
| * email: [email protected]                |
| * bug system: https://logstash.jira.com/                |
|                                                         |
+---------------------------------------------------------+
The error reported is: 
  Permission denied - bind(2)

이 구성을 수행하고 Syslog 예제를 사용합니다.