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https://issues.apache.org/jira/browse/SLING-2279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Carsten Ziegeler resolved SLING-2279.
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Resolution: Fixed
Fix Version/s: Security 1.0.0
Thanks for your patch - I've applied it in revision 1202087
> ReferrerFilter should not reverse lookup the IPs of interfaces
> --------------------------------------------------------------
>
> Key: SLING-2279
> URL: https://issues.apache.org/jira/browse/SLING-2279
> Project: Sling
> Issue Type: Improvement
> Components: Extensions
> Environment: contrib / extensions /
> org.apache.sling.security-0.5.0-SNAPSHOT.jar
> Reporter: Tobias Bocanegra
> Assignee: Carsten Ziegeler
> Fix For: Security 1.0.0
>
> Attachments: referrer-r1200559.patch
>
>
> The o.a.s.security.impl.ReferrerFilter initializes the
> getDefaultAllowedReferrers() with the hostnames of the local interfaces. I
> doubt that this has any meaning in a productive environment, as the server
> most probably runs behind a loadbalancer or proxy. the problem with this
> initialization is that it might result in a reverse DNS lookup, which can be
> very slow.
> suggest to remove the hostnames from the default referrers:
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