# Docker: Why does logging in on one Ignition instance cause log out on other Ignition instances?

**URL:** <https://forum.inductiveautomation.com/t/docker-why-does-logging-in-on-one-ignition-instance-cause-log-out-on-other-ignition-instances/78839>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [September 7, 2023, 12:10am UTC](https://forum.inductiveautomation.com/t/docker-why-does-logging-in-on-one-ignition-instance-cause-log-out-on-other-ignition-instances/78839 "2023-09-07T00:10:00Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 7, 2023, 4:48pm UTC](https://forum.inductiveautomation.com/t/docker-why-does-logging-in-on-one-ignition-instance-cause-log-out-on-other-ignition-instances/78839/4 "2023-09-07T16:48:03Z")

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I don't think this is Chrome-specific, but rather how [HTTP cookies are specified](https://www.rfc-editor.org/rfc/rfc6265).

In particular:

> Similarly, cookies for a given host are shared  
> across all the ports on that host, even though the usual "same-origin  
> policy" used by web browsers isolates content retrieved via different  
> ports.

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