Looking for a way to allow anonymous access to RSS feeds on a public SharePoint 2013 site collection which uses the publishing site template and has the "Limited-access user permission lockdown mode" site collection feature enabled. I've figured out how to update permissions on the target list to allow items to be view, etc. However, even with anonymous access set to Entire site at the site collection level, I get an authentication prompt when trying to access the RSS feed directly for the list. The URL the anonymous users access for the RSS feed is http://www.mydomain.com/_layouts/15/listfeed.aspx?List=%7BF5T64DE6%2DB1F6%2D41F8%2D94AE%2D33E0FC1E217A%7D
So my guess is there is a site permission that might be needed to allow successful access to the RSS feed. I tried granting FullMask permissions on the target list, but still get prompted for creds. I've tested turning off the lockdown feature and the RSS feed does become available to anon users. However, I've heard disabling that feature may not be the best security move for a public-facing site.
Any tips would be appreciated.