We have configured CUG for certain pages in our site and configured a login page to which all the unauthenticated requests should be redirected to. After restarting our AEM 6.3 SP2 publish server, the login for CUG protected sites is no longer working.When we hit the secure page, the publish server returns a 404.Any ideas what could be the problem?

Hi All,We have migrated to 6.3 and we are facing some issues with link checker. It is disabling some of the links in publish, while allowing some other, but both the links are from same domain only. We are getting following exception in logs,19.11.2018 13:59:42.865 *ERROR* [sling-default-2278-com.day.cq.rewriter.linkchecker.impl.LinkCheckerTask.7897] com.day.cq.rewriter.linkchecker.impl.LinkCheckerTask Failed to validate URL http://www.abc.com/*******; java.net.UnknownHostException: www.abc.comT...