# Problem with cipher not available

**URL:** <https://discuss.elastic.co/t/problem-with-cipher-not-available/117987>\
**Category:** Logstash\
**Created:** [February 1, 2018, 9:43am UTC](https://discuss.elastic.co/t/problem-with-cipher-not-available/117987 "2018-02-01T09:43:08Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![TimoHar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/timohar/32/27257_2.png) [@TimoHar](https://discuss.elastic.co/u/TimoHar)\
**Post date:** [February 2, 2018, 2:09pm UTC](https://discuss.elastic.co/t/problem-with-cipher-not-available/117987/2 "2018-02-02T14:09:56Z")

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Hello;

Have you tried debug logging? If yes,

1. Look through those debug logs for "-Dio.netty.tmpdir" to confirm what directory netty is using.
2. Look for "netty-tcnative not in the classpath" to see if it is the same issue as [Problem with cipher in beat input](https://discuss.elastic.co/t/problem-with-cipher-in-beat-input/67841/5) (on 5.x) or [Beats plugin will not start with "cipher not found"](https://discuss.elastic.co/t/beats-plugin-will-not-start-with-cipher-not-found/117902) (on 6.x)

BTW, I don't have a solution; the second issue (on 6.x) is mine, but no responses yet.

Thanks!

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