# ElasticSearch IPv6

**URL:** https://discuss.elastic.co/t/elasticsearch-ipv6/383150
**Category:** Elasticsearch
**Created:** [November 1, 2025, 2:34pm UTC](https://discuss.elastic.co/t/elasticsearch-ipv6/383150 "2025-11-01T14:34:17Z")
**Posts on this page:** 1
**Showing post:** 2

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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: [November 1, 2025, 5:22pm UTC](https://discuss.elastic.co/t/elasticsearch-ipv6/383150/2 "2025-11-01T17:22:55Z")

</div>

Somewhat confusingly `tcp6` refers to the mixed IPv4 and IPv6 stack, as you can see from this line which has an IPv4 address:

> `tcp6 0 0 10.0.0.12:9300 :::* LISTEN 1040/java`

This line means it’s listening on all interfaces:

> `tcp6 0 0 :::9200 :::* LISTEN 1040/java`

Please read [these docs](https://www.elastic.co/docs/reference/elasticsearch/configuration-reference/networking-settings#modules-network-binding-publishing) carefully for further information, noting in particular:

> It is usually a mistake to use `0.0.0.0` as a publish address on hosts with more than one network interface.

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_[View the full topic](https://discuss.elastic.co/t/elasticsearch-ipv6/383150)._