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HP Jetdirect Print Servers - Unable to Access Printer's Embedded Web Server After Installing a Jetdirect Certificate

Issue

After installing a Jetdirect certificate, the printer's embedded web server (EWS) cannot be accessed. This is caused by installing an incorrect certificate as the Jetdirect certificate. The only certificate that can be installed as a Jetdirect certificate is one that has been created from a certificate request generated from the same Jetdirect print server.
By default, a Jetdirect print server will redirect all HTTP requests to HTTPS which utilizes the Jetdirect certificate. When an invalid certificate is installed as the Jetdirect certificate, the HTTPS communication is affected and attempts to remove the certificate through a cold reset or an NVRAM initialization does not resolve the issue.

Solution

Currently, the only way to remove a certificate from the Jetdirect is to overwrite the current Jetdirect certificate with a new one through the EWS but in this case, in order to access the EWS, the HTTPS redirect must first be disabled as explained below:
  1. Open a telnet session with the Jetdirect.
  2. At the telnet prompt, type ssl-state: 2 and press the Enter key. A value of 1 enables the HTTPS redirect and a value of 2 disables it.
  3. Type exit and press the Enter key to close the telnet session. When prompted to save the settings, type Y and press the Enter key.
After the telnet session has been closed, browse to the EWS using HTTP and overwrite the Jetdirect certificate using the following steps:
  1. Open an internet browser session with the Jetdirect using an HTTP connection. For example, if the IP address of the Jetdirect is 192.168.10.50, the URL would be: http://192.168.10.50.
  2. Click on the Networking tab.
  3. Click on the 802.1x Authentication security menu option located on the left side of the page.
  4. Click on the Configure button for the Jetdirect certificate.
  5. Depending on the Jetdirect model and firmware, there will be an option to Update Pre-Installed Certificate or Create New Self-Signed Certificate. Select this option and then click the Next button.
  6. A page will be provided from which the validity period of the new certificate can be changed, if chosen to do so. To accept the settings and continue with the process, click the Finish button.

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