# Multiple docker instances on the same host share the same connection

**URL:** <https://forum.inductiveautomation.com/t/multiple-docker-instances-on-the-same-host-share-the-same-connection/37452>\
**Category:** Ignition\
**Created:** [August 6, 2020, 1:20pm UTC](https://forum.inductiveautomation.com/t/multiple-docker-instances-on-the-same-host-share-the-same-connection/37452 "2020-08-06T13:20:59Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [August 6, 2020, 4:35pm UTC](https://forum.inductiveautomation.com/t/multiple-docker-instances-on-the-same-host-share-the-same-connection/37452/2 "2020-08-06T16:35:22Z")

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More on this behavior here:

> [@Odd behavior when running multiple 8.0.X Gateways in one PC](http://forum.inductiveautomation.com/t/odd-behavior-when-running-multiple-8-0-x-gateways-in-one-pc/36005):
>
> This week, after the announcement of Ignition Maker Edition, I downloaded the Windows ZIP installer, and unzipped it into two locations, each with a different purpose; one would be full-fleged Ignition, and the other Maker Edition. Since in my company we are still supporting 7.9, I’ve been doing this ZIP installs for quite some time; having each Gateway registered with its own service name, and configuring all in different ports (HTTP, HTTPS, Metro SSL). Before this week I was only running 7.9…

It's a function of the webserver not isolating the session authentication cookies per host:ip - only per host. There's a workaround mentioned there, but I wouldn't necessarily recommend it unless you really know what you're doing.  
If you're developing entirely on the local machine, there should be internal IPs for each container that are unique - something like `172.17.0.X`. You can access whatever port on that internal IP, regardless of what the container is set to expose.

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