I'm getting the dreaded "The RSS webpart does not support authenticated
feeds" error when attempting to view a list with the RSS Web part. I have
Kerberos Authentication enabled and working (All users authenticate via
Kerberos) and I have enabled Anonymous Access on my site. I've even had this
RSS feed working without issue, however a day or two ago it broke and I don't
know why.
When I go into the List and click
Settings -> List Settings -> Permissions for this List -> Settings ->
Anonymous Access
I have the four boxes available to select. It doesn't matter which box is
selected, the settings don't stick. I have selected View, Edit, Add, and even
all four, but when I click Ok and go back in they are all unselected. I am
unable to locate anything in the logs except a "401 unauthorized" error when
attempting to load the RSS feed (Which is obvious since the settings aren't
applying correctly).
Has anyone seen this before? Is there a hidden setting somewhere that I'm
missing? All external RSS web parts are working as expected, it's only ones
that are attempting to read a List Library. And, to stress, this was working
up until a day or two ago when it just mysteriously broke....