# ES site-local addressing scheme

**URL:** <https://discuss.elastic.co/t/es-site-local-addressing-scheme/202007>\
**Category:** Elasticsearch\
**Created:** [October 2, 2019, 4:33pm UTC](https://discuss.elastic.co/t/es-site-local-addressing-scheme/202007 "2019-10-02T16:33:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ldenitto](https://avatars.discourse-cdn.com/v4/letter/l/f05b48/32.png) [@ldenitto](https://discuss.elastic.co/u/ldenitto)\
**Post date:** [October 2, 2019, 4:33pm UTC](https://discuss.elastic.co/t/es-site-local-addressing-scheme/202007/1 "2019-10-02T16:33:42Z")

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I'm fairly new to ES and looking forward to implementing it in my environment. When going through the config documentation, I came across this:

[https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html#network-interface-values](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html#network-interface-values) and have a question regarding the _site_ parameters. It mentions "Any site-local addresses on the system, for example `192.168.0.1`."

Where/how are these site local address subnets determined/assigned? Where/how are they sourced?

Apologies if this question is a bit unclear and I can clarify further if needed. Any help is appreciated.

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**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [October 2, 2019, 4:49pm UTC](https://discuss.elastic.co/t/es-site-local-addressing-scheme/202007/2 "2019-10-02T16:49:20Z")

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It means any of your machine's local addresses that match this check:

> <https://github.com/openjdk/jdk/blob/9d764ee48ee7c2e7be7a25aee2ed7bed2fcd2000/src/java.base/share/classes/java/net/Inet4Address.java#L210-L221>

So that's the subnets `10.0.0.0/8`, `172.16.0.0/12` and `192.168.0.0/16`.

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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:** [October 30, 2019, 4:49pm UTC](https://discuss.elastic.co/t/es-site-local-addressing-scheme/202007/3 "2019-10-30T16:49:22Z")

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Closed on October 30, 2019, 4:49pm UTC

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