Epson TM-T20II-i Server Direct Print Users Manual for TM-i firmware ver.4.1 - Page 37

Chapter 3 Request and Response Digest Access Authentication This section describes the flow and settings for carrying out Digest access authentication with the web server. TM Intelligent Printer 1 : HTTP Request (Dummy) Web Server 2 : HTTP Response (401 Unauthorized) 3 : HTTP request containing a user ID and password (Print request / Printing Result) 3.1 : Server process 3.2 : HTTP Response (Print request / Printing Result) 3 For Digest access authentication, the printer sends a dummy HTTP request before sending a print-related request to the server. The server returns a response with HTTP status code "401 Unauthorized". The printer sends a print-related request containing the user ID and password. The server carries out the Digest access authentication process. Once authenticated, the server continues to carry out the print-related process. Digest Access Authentication Settings Digest access authentication requires settings for the TM intelligence printer and the server. TM Intelligent Printer Use EPSON TMNet WebConfig of TM-i/TM-DT to set your user ID and password required for Digest access authentication. For details, see "Server Direct Print Settings" for individual TM intelligent printers. (TM-i: p. 21/ TM-DT: p. 24) Web Server Settings For detailed information on how to set Web server's Digest access authentication, see individual Web server documents, etc. 37