Work summary
This has happened in the past and the workaround for it was as below:
http://libraryblogs.is.ed.ac.uk/eresources/tag/ezproxy/
ezproxy logs had filled the root filesystem and so authentication was unable to work.
Technical summary
E-resources not accessible
Request, Authorise and Publish
Requested by Qasim Afzal on 16-Nov-2017
Authorised by User Services
Publish to IS Website (Service Status and Alerts page):
Yes
Published by
Qasim Afzal
Additional Details
Notes for future reference