# Elastic Endpoint Security - Unkown Internet Connections

**URL:** <https://discuss.elastic.co/t/elastic-endpoint-security-unkown-internet-connections/272999>\
**Category:** Endpoint Security\
**Created:** [May 14, 2021, 9:28am UTC](https://discuss.elastic.co/t/elastic-endpoint-security-unkown-internet-connections/272999 "2021-05-14T09:28:36Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![RafnexJr](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rafnexjr/32/54405_2.png) [@RafnexJr](https://discuss.elastic.co/u/RafnexJr)\
**Post date:** [May 14, 2021, 9:28am UTC](https://discuss.elastic.co/t/elastic-endpoint-security-unkown-internet-connections/272999/1 "2021-05-14T09:28:36Z")

</div>

Hi everyone,

I deployed an Elastic Stack with Endpoint Security in my Lab and now I looked at the communication and some communication is clear to me, like:

telemetry.elastic[.]co  
epr.elastic[.]co  
artifacts.security.elastic[.]co

But I have a lot of communication from the Metricbeat of Endpoint Security to the IP 172.0.0.1 which is a public ip with the dns ( 172-0-0-1.lightspeed.brhmal.sbcglobal[.]net) according to Talos. Does anyone know for what this communication is?

Is there anywhere a ressource/documentation on the internet communication of the Elastic Stack components and mabye how to use it in an offline environment?

Thanks a lot! Cheers Steven

---

<div class="post-metadata">

**Author:** ![ferullo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ferullo/32/74240_2.png) [@ferullo](https://discuss.elastic.co/u/ferullo)\
**Post date:** [May 14, 2021, 6:00pm UTC](https://discuss.elastic.co/t/elastic-endpoint-security-unkown-internet-connections/272999/2 "2021-05-14T18:00:26Z")

</div>

Hi @RafnexJr

Different Elastic applications on your computer will communicate locally with each other, that traffic happens over the IP address [127.0.0.1](https://en.wikipedia.org/wiki/Localhost). Maybe you're seeing that traffic and transposed 127 to 172 when you did your lookup?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 11, 2021, 6:00pm UTC](https://discuss.elastic.co/t/elastic-endpoint-security-unkown-internet-connections/272999/3 "2021-06-11T18:00:49Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.