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https://issues.apache.org/jira/browse/GUACAMOLE-1257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17264420#comment-17264420
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Nick Couchman commented on GUACAMOLE-1257:
------------------------------------------

Did more testing and confirmed that things appear, to me, to be working as 
expected:
- Set "postgresql-default-max-connections: 1" and 
"postgresql-default-max-connections-per-user: 1" in guacamole.properties
- Tested with various combinations of the same user logging in from multiple 
browsers and multiple users logging in.

In all of the tests that I did, the system behaves as expected - blocks 
connections when the limits are reached, and allows the connections up to that 
point. I'm not seeing behavior that indicates that there's anything broken, 
here. The only difference that I can see is that you're using the MySQL module 
and I'm using the Postgres module. I'm also testing with a later version (1.3.0 
instead of 1.2.0). Maybe you could try Guacamole Client 1.3.0 and see if you're 
able to reproduce the issue?

> Unable to limit no of concurrent users
> --------------------------------------
>
>                 Key: GUACAMOLE-1257
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-1257
>             Project: Guacamole
>          Issue Type: Bug
>    Affects Versions: 1.2.0
>         Environment: Debian 10, GCP
>            Reporter: Reuben Rodrigues
>            Priority: Minor
>
> *How to reproduce?*
> 1. Set the following parameters with values of one:
>  * {{mysql-absolute-max-connections}}
>  * {{mysql-default-max-connections}}
>  * {{mysql-default-max-group-connections}}
>  * {{mysql-default-max-connections-per-user}}
>  * {{mysql-default-max-group-connections-per-user}}
> 2. When the same user tries to access another instance of Guacamole from 
> another tab he is allowed
>  
> *Expected Behavior*
> Only one user should be able to connect at a given time
>  
> Am I missing anything in the settings here? Any help would be appreciated.



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