210 CHAPTER 13: M ONITORING S YSTEM E VENTS A preload task has failed. Content Filtering EventsThis includes the following events: The content filter license has expired. The Websense Enterprise server is unreachable.In addition to the above, the Webcache automatically generates theemail notifications shown in “Automatic System Events” on page 214.You can send a test email to the SMTP server immediately by clickingSend Now. You may want to do this to test that the Email Notificationsettings are correct. The Webcache will indicate if the test email has beensent successfully or not. If there is a problem it may take up to oneminute for the Send Now operation to time out depending on the type ofproblem.SMTP Authentication If you choose to configure Email Notification or Email Graphs on theWebcache, you can enable and configure Simple Mail Transfer Protocol(SMTP) Authentication.Enabling SMTP AuthenticationYou can enable SMTP Authentication for Email Notification or EmailGraphs by checking Enable SMTP Authentication and specifying an SMTPUsername and SMTP Password. The SMTP server will attempt toauthenticate email in the following way: If the SMTP server reports that it cannot perform authentication, theemail will fail. An entry is made in the Webcache’s System Log torecord the failure. If the SMTP server can perform authentication, the Webcache willautomatically use the strongest form of authentication supported byboth the Webcache and SMTP server. It attempts to use CRAM-MD5and Plain authentication in that order. CRAM-MD5 authenticationprevents the username and password from being sent as clear text.Plain authentication sends the username and password as clear text.The SMTP server must support CRAM-MD5 authentication for theWebcache to use that method. CRAM-MD5 is an option in Unix SMTPservers such as Sendmail. You must configure Sendmail to use a typeof SMTP authentication. Windows Exchange does not supportdua1611-5aaa04.book Page 210 Friday, November 29, 2002 8:56 PM
