# Elasticsearch 2.1 network settings

**URL:** <https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633>\
**Category:** Elasticsearch\
**Created:** [November 26, 2015, 7:07am UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633 "2015-11-26T07:07:05Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![zpp](https://avatars.discourse-cdn.com/v4/letter/z/54ee81/32.png) [@zpp](https://discuss.elastic.co/u/zpp)\
**Post date:** [November 26, 2015, 7:07am UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633/1 "2015-11-26T07:07:05Z")

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Hi,  
I just installed elasticsearch 2.1, and from the log, it shows it's using 127.0.0.1 while version 1.7 it's bounded to actual IP address.  
[INFO][transport] publish\_address {127.0.0.1:9300}, bound\_addresses {127.0.0.1:9300}, {[::1]:9300}  
[INFO][http] publish\_address {127.0.0.1:9200}, bound\_addresses {127.0.0.1:9200}, {[::1]:9200}

with this change, the indexer faced connection problem if i configure the hosts as server name or server actual IP address. It worked if i use 127.0.0.1 (I didn't check if localhost works).  
From the network document, it looks to me this is expected. Did I get this correctly?

And there is a warning message in the log, what does this mean? and how to fix it?  
[2015-11-26 14:20:06,191][WARN][bootstrap] unable to install syscall filter: prctl(PR\_GET\_NO\_NEW\_PRIVS): Invalid argument

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [November 27, 2015, 6:43am UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633/2 "2015-11-27T06:43:32Z")

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Read over [https://www.elastic.co/guide/en/elasticsearch/reference/2.1/breaking\_20\_network\_changes.html#\_bind\_to\_localhost](https://www.elastic.co/guide/en/elasticsearch/reference/2.1/breaking_20_network_changes.html#_bind_to_localhost)

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**Author:** ![zpp](https://avatars.discourse-cdn.com/v4/letter/z/54ee81/32.png) [@zpp](https://discuss.elastic.co/u/zpp)\
**Post date:** [November 27, 2015, 7:58am UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633/3 "2015-11-27T07:58:48Z")

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Thank you. How about the warning? what does it mean?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [November 27, 2015, 9:18am UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633/4 "2015-11-27T09:18:45Z")

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Not sure sorry.

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**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\
**Post date:** [November 27, 2015, 10:31am UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633/5 "2015-11-27T10:31:30Z")

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> [@zpp](#):
>
> unable to install syscall filter: prctl(PR\_GET\_NO\_NEW\_PRIVS): Invalid argument

This can be ignored and does not harm ES.

The ES team opened a playground to fiddle with Linux syscalls to minimize ES process privileges at bootstrap time, some of the calls may succeed, some may fail.

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**Author:** ![zpp](https://avatars.discourse-cdn.com/v4/letter/z/54ee81/32.png) [@zpp](https://discuss.elastic.co/u/zpp)\
**Post date:** [November 30, 2015, 1:24am UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633/6 "2015-11-30T01:24:07Z")

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noted, thank you all for the clarification 🙂

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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:** [July 5, 2017, 11:35pm UTC](https://discuss.elastic.co/t/elasticsearch-2-1-network-settings/35633/7 "2017-07-05T23:35:01Z")

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