# Weak cipher usage - diffie-hellman-group1-sha1

**URL:** <https://discuss.elastic.co/t/weak-cipher-usage-diffie-hellman-group1-sha1/227972>\
**Category:** Elasticsearch\
**Created:** [April 14, 2020, 5:59pm UTC](https://discuss.elastic.co/t/weak-cipher-usage-diffie-hellman-group1-sha1/227972 "2020-04-14T17:59:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![dimalini](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dimalini/32/22448_2.png) [@dimalini](https://discuss.elastic.co/u/dimalini)\
**Post date:** [April 14, 2020, 5:59pm UTC](https://discuss.elastic.co/t/weak-cipher-usage-diffie-hellman-group1-sha1/227972/1 "2020-04-14T17:59:08Z")

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Hi, One of our customers has reported that in their machine where ES is configured, a scanner identified port 22 to be used by some ES dependent service and that it flagged for using a weak cipher - 'diffie-hellman-group1-sha1'.

> Deprecated SSH Cryptographic Settings  
> Port: 22, Status: Open
> 
> QualysGuard - Retail: Type Name key exchange diffie-hellman-group1-sha1

OS : Windows Server 2012  
ES version : 5.4.1

I couldn't find the same in my local machine.

Is anyone aware of this case, please share details.

Thanks,  
Divya

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**Author:** ![ikakavas](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ikakavas/32/34430_2.png) [@ikakavas](https://discuss.elastic.co/u/ikakavas)\
**Post date:** [April 14, 2020, 6:01pm UTC](https://discuss.elastic.co/t/weak-cipher-usage-diffie-hellman-group1-sha1/227972/2 "2020-04-14T18:01:59Z")

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Port 22 is commonly used for SSH, and the message points to that also. This is unrelated to elasticsearch and elasricsearch doesnt depend on an SSH server / service

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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 12, 2020, 6:02pm UTC](https://discuss.elastic.co/t/weak-cipher-usage-diffie-hellman-group1-sha1/227972/3 "2020-05-12T18:02:10Z")

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Closed on May 12, 2020, 6:02pm UTC

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