Mike Jumper commented on GUACAMOLE-957:

Could you find out, what LDAP library/functions does v1.0.0 use and what the 
v1.1.0? There must be some change.


If this is not supported anymore, is there any other possibility to enter 
multiple LDAP servers?

It was never supported. If what you were doing was working before, what you 
were relying on was undocumented behavior that even we were unaware of. It was 
not an intentional feature.

> Add support for querying multiple LDAP servers
> ----------------------------------------------
>                 Key: GUACAMOLE-957
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-957
>             Project: Guacamole
>          Issue Type: New Feature
>          Components: guacamole-auth-ldap
>            Reporter: Robert Wolf
>            Priority: Minor
> Hello,
> we have configured guacamole with postgresql (for configuration) and LDAP 
> (for authentication only) in version 1.0.0. The LDAP server are 3 Windows AD 
> servers.
> We have configured guacamole LDAP auth with {noformat}
> ldap-hostname: SERVER1 SERVER2 SERVER3
> {noformat}
> During authentication, guacamole connects to first server. If the connection 
> fails, it connectes to seconds server and if this connection fails to, it 
> connects to the third server. It works great in guacamole 1.0.0. But the 
> version 1.0.0 has problem with LDAP groups.
> So we have updated to 1.1.0. But in this configuration the multiple LDAP 
> hosts are incorrectly parsed and login does not work with "Invalid login" on 
> login page and following error message in the log {noformat}
> 13:21:24.339 [http-nio-8080-exec-16] ERROR o.a.g.a.ldap.LDAPConnectionService 
> - Binding with the LDAP server at "SERVER1 SERVER2 SERVER3" as user "bind-dn" 
> failed: ERR_04121_CANNOT_RESOLVE_HOSTNAME Cannot connect to the server, 
> Hostname 'SERVER1 SERVER2 SERVER3' could not be resolved.
> 13:21:24.340 [http-nio-8080-exec-16] ERROR 
> o.a.g.a.l.AuthenticationProviderService - Unable to bind using search DN 
> "bind-dn"
> 13:21:24.342 [http-nio-8080-exec-16] WARN  o.a.g.r.auth.AuthenticationService 
> - Authentication attempt from [,] for user 
> "ad.user@domain" failed.
> {noformat}
> Could you verify this issue? Is there some other possible format for multiple 
> hostnames in *ldap-hostname* attribute? I have already tried to use "," 
> (comma) instead of space and to use LDAP URI format, but nothing works.
> Thank you for you answer.
> Regards,
> Robert Wolf.

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