# Docker Instance Sign-in

**URL:** <https://forum.inductiveautomation.com/t/docker-instance-sign-in/85360>\
**Category:** General Discussion\
**Tags:** ignition81\
**Created:** [February 7, 2024, 11:48am UTC](https://forum.inductiveautomation.com/t/docker-instance-sign-in/85360 "2024-02-07T11:48:18Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [February 7, 2024, 1:20pm UTC](https://forum.inductiveautomation.com/t/docker-instance-sign-in/85360/2 "2024-02-07T13:20:21Z")

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Same hostname, same cookie, unfortunately.

> [@Docker: Why does logging in on one Ignition instance cause log out on other Ignition instances?](https://forum.inductiveautomation.com/t/docker-why-does-logging-in-on-one-ignition-instance-cause-log-out-on-other-ignition-instances/78839/4):
>
> 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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