I ran into an issue where I was unable to view announcements on our Public Internet SharePoint Site. After researching I learned it was because of lockdown feature that was enabled under the Publishing Pages. I was able to access announcements under team sites just not under any publishing sites so that showed me it was something with the Publishing Sites. Listed below are the steps one can take to enable or disable this feature.
To Determine if a site has ViewFormPagesLockDown enabled run the following:
get-spfeature -site http://sitecollectionURL
If ViewFormpagesLockDown is listed, its enabled
To toggle lockdown mode to off:
$lockdown = get -spfeature viewformpageslockdown
disable -spfeature $lockdown -url http://sitecollectionURL
if anonymous is already setup you may need to disable\re-enable anonymous on the site.
