How to Troubleshoot Fortinet SSL

Written by suvro banerji
  • Share
  • Tweet
  • Share
  • Email

Fortinet SSL VPN technology creates a safe channel for you to do business over the Internet; it encrypts all data that you choose to share from a Web browser to a Web server, thus protecting it from potential intruders and unauthorised users. Occasionally you may encounter issues with your Fortinet SSL VPN, but there are troubleshooting techniques you can use to resolve such issues. Note that you will require administrative rights on your computer to perform this task.

Skill level:


  1. 1

    Enable compatibility view for all websites in your Internet Explorer Web browser. Click the "Tools" menu and select "Compatibility View Settings." Click to check the "Display all websites in Compatibility View" check box. Click "Close."

  2. 2

    Re-register your Fortinet device. Log in to your Fortinet account and click the "Register/Renew" option in the "Asset Management" section. Enter the "Serial Number" of the device to be re-registered, the "Support Contract Number" provided to you when you purchased the Fortinet device and a "Product Description" to identify your device in their respective fields. Select the name of the "Fortinet Partner" from whom you bought the equipment. Click "Next." Read the Services Agreement and click "Agree" to complete the re-registration.

  3. 3

    Enable cookie acceptance on your Internet Explorer Web Browser to allow SSL VPN. Click the "Tools" menu and select "Internet Options." Click the "Privacy" tab. Drag the settings slider to "Low" or "Accept All Cookies." Click "OK."

  4. 4

    Troubleshoot the error message "The SSL session was blocked because the session ID was unknown." Connect to the CLI on your FortiGate unit. Use the following commands to append the option to allow-unknown-sess-id:

    config firewall profile

    edit <profile_str>

    set https <other-https-options>



Don't Miss

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.