Operation Through DCE Caching

If Unified Client for Samsung Smart UX cannot communicate with the DCE, the client goes into "offline" mode. At this point, the device can still authenticate user credentials against its own internal cache, if enabled. If a connection between DCE and CAS fails, then the device will authenticate using the DCE server rather than the internal cache. In either case, users whose credentials match a previously cached set are granted device access; if the credentials do not match, the users are denied access. In offline mode, the Samsung Smart UX allows the caching of card swipe data through DCE.

To enable Login caching if the DCE loses contact with CAS, do the following:

  1. Open System Manager and navigate to Configuration > Security and authentication > User authentication. The User Authentication configuration dialog box opens.

  2. In the CAS offline behavior section, select the Login caching from the DCE servers drop-down list.
    • Disabled: DCE follows offline behavior settings; the regular rules for cached only and allow all apply.
    • Enabled: DCE authenticates users against its internal cache, rather than contacting CAS.

      DCE login caching determines whether a user login is accepted or denied when CAS is offline. If DCE caching is disabled when CAS is offline, then users cannot login. If DCE caching is enabled when CAS is offline, then DCE allows users to login only if they had previously logged in when CAS was online.

      For example, if DCE caching is enabled, and User1 authenticated while CAS was online, but User2 did not, then if CAS goes offline, User1 can still login, but User2 cannot login until CAS comes online again. Once CAS is back online, then User2 can login, and continue to login even if CAS goes offline again.
      Account limits are not enforced, and Billing Codes are not validated when DCE is operating without a connection to CAS.
  3. Select how DRE servers handle print jobs when CAS is offline.
    • Auto select: If account limits are enforced, then the Do not print option is used. If account limits are not enforced, then the Print, charge accounts later option is used.
    • Do not print: Users cannot print, and must wait until CAS is back online in order to print.
    • Print, charge accounts later: Users can print, and then the print job is charged to their account when CAS is back online.