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https://issues.apache.org/jira/browse/SLING-2870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13659528#comment-13659528
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Carsten Ziegeler commented on SLING-2870:
-----------------------------------------
It as simple as: without an additional configuration only default hosts are
allowed - additional hosts can be configured either by listing them in the
allowed hosts property or by adding a regex in the allowed regexp property.
> Support allowed hosts patterns in ReferrerFilter
> ------------------------------------------------
>
> Key: SLING-2870
> URL: https://issues.apache.org/jira/browse/SLING-2870
> Project: Sling
> Issue Type: Improvement
> Components: Extensions
> Affects Versions: Security 1.0.2
> Reporter: Timothee Maret
> Attachments: SLING-2870.patch
>
>
> The current "allow.hosts" setting of the ReferrerFilter can be configured
> with a list of trusted hosts.
> In a setup where the list of allowed hosts is expending as the application
> runs, it becomes tricky to keep the configuration in sync.
> As an example, a service which supports wilcard uris such as
> {{<userId>.my.service.com}} would be required to modify the reference filter
> configuration for each user which is hardly doable.
> Thus, I would propose to support regex patterns for the list of
> "allow.hosts". which would still be secure.
> The example above would be configured as: {{allow.hosts=(.*).my.service.com}}
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