# Logstash beats: 69/71 error

**URL:** https://discuss.elastic.co/t/logstash-beats-69-71-error/290708
**Category:** Logstash
**Created:** [December 1, 2021, 8:07pm UTC](https://discuss.elastic.co/t/logstash-beats-69-71-error/290708 "2021-12-01T20:07:32Z")
**Posts on this page:** 1
**Showing post:** 3

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### 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: [December 1, 2021, 8:18pm UTC](https://discuss.elastic.co/t/logstash-beats-69-71-error/290708/3 "2021-12-01T20:18:55Z")

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> [@userR](#):
>
> `InvalidFrameProtocolException: Invalid version of beats protocol: 69`

Generally this means that something that is not speaking the beats protocol is connecting to the input. Amongst the possible causes are:

1. A beat with SSL enabled connecting to a beat input with SSL disabled
2. A beat with SSL disabled connecting to a beat input with SSL enabled
3. A port scanner (on the public internet you can be certain that folks are port scanning you, on a corporate network this may also happen)
4. Someone else trying to use the same port
5. In a beat configuration someone uncommented the hosts: line for the logstash output, but left output.logstash commented and output.elasticsearch uncommented, so that the beat starts talking HTTP to the beats input instead of lumberjack

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