# Suggestion: improve documentation on Logstash-to-logstash page, certs expire in one month

**URL:** <https://discuss.elastic.co/t/suggestion-improve-documentation-on-logstash-to-logstash-page-certs-expire-in-one-month/177535>\
**Category:** Logstash\
**Created:** [April 18, 2019, 8:00pm UTC](https://discuss.elastic.co/t/suggestion-improve-documentation-on-logstash-to-logstash-page-certs-expire-in-one-month/177535 "2019-04-18T20:00:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jcaballero](https://avatars.discourse-cdn.com/v4/letter/j/278dde/32.png) [@jcaballero](https://discuss.elastic.co/u/jcaballero)\
**Post date:** [April 18, 2019, 8:00pm UTC](https://discuss.elastic.co/t/suggestion-improve-documentation-on-logstash-to-logstash-page-certs-expire-in-one-month/177535/1 "2019-04-18T20:00:10Z")

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the page [https://www.elastic.co/guide/en/logstash/current/ls-to-ls.html](https://www.elastic.co/guide/en/logstash/current/ls-to-ls.html) explains, step by step, how to setup your infrastructure to use Lumberjack for LogStash to LogStash communication.  
However, a key point is missing. The certificates generated with the openssl command

```
openssl req -x509 -batch -nodes -newkey rsa:2048 -keyout lumberjack.key -out lumberjack.cert -subj /CN=localhost

```

expire after one month.  
I think it is worth mentioning.

Cheers,  
Jose

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 16, 2019, 8:00pm UTC](https://discuss.elastic.co/t/suggestion-improve-documentation-on-logstash-to-logstash-page-certs-expire-in-one-month/177535/2 "2019-05-16T20:00:10Z")

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