Skip to main content
Baya
Baya
Visitor III
February 14, 2022
Solved

SSL-VPN automatic resolution screen not working after 7.0.4 firmware upgrade

  • February 14, 2022
  • 4 replies
  • 19863 views

After updating, all our SSL-VPN RDP clients complained because their session stopped auto-scaling the resolution on their browser. Have someone found a way to make this unintended behaivor stop? We could not find any way to made it like it was befor patching. We were specting that 7.0.5 could fix it but i dont see any mention in the log page...

Best answer by gt1

Found how to solve this. You must go in to each SSL VPN Portal and set the Width and Height to 0. 

Command:

 

FIREWALL (web-access) # show full-configuration | grep window
set default-window-width 1024
set default-window-height 768

FIREWALL (web-access) # set default-window-width 0

FIREWALL (web-access) # set default-window-height 0

FIREWALL (web-access) # end

 

Then you must change your bookmarks to 0 and 0 for height and width and full screen works again.

4 replies

A
Anonymous_User
Contributor
February 15, 2022

Hi, 
Thank you for using Fortinet Community. 

The FortiOS 7.0.4 release notes contains the following information:

747602  - Allow customization of RDP display size (width and height settings) for SSL VPN web mode when creating a new connection or bookmark. Administrators can also specify the display size when pre-configuring bookmarks.

The following are the CLI reference for:

 

Please let me know if this works for you :)

Baya
BayaAuthor
Visitor III
February 15, 2022

Hello ibinmohdishak,

First of all, thanks for the quick answer. Sadly I have already read the links you put there. I guess the misunderstanding is because this is not my native language. I would try to express myself better.

The issue is that we cannot find a configuration for the automatic resize resolution on the SSL VPN web (that uses RDP). As you can see in the documentation there is a way to manually configure the screen width and height:

 

width

Screen width .

integer

Minimum value: 640 Maximum value: 65535

1024

height

Screen height .

integer

Minimum value: 480 Maximum value: 65535

768

 

Before 7.0.4 this was done automatically, now all our RDP conections apparently need fixed values. Because of covid, a big part of our users are working on their home computers, they all have different size monitors and, as you can assume, it is not an option to manually set all users. We update it because the documentation explicity said that this was only done when creating a new connection or bookmark:

 

747602

Allow customization of RDP display size (width and height settings) for SSL VPN web mode when creating a new connection or bookmark. Administrators can also specify the display size when pre-configuring bookmarks.

 

But this is sadly not true :(, the already configured users have been all changed to this new fixed values automatically. I hope we're just misreading something!

    gt1
    gt1
    Visitor III
    April 20, 2022

    We have the same problem and can no longer upgrade our firewalls due to the screen size not working. 7.2.0 did not fix the problem. Why would they change something that has worked perfect for so long?

    gt1
    gt1Answer
    Visitor III
    April 21, 2022

    Found how to solve this. You must go in to each SSL VPN Portal and set the Width and Height to 0. 

    Command:

     

    FIREWALL (web-access) # show full-configuration | grep window
    set default-window-width 1024
    set default-window-height 768

    FIREWALL (web-access) # set default-window-width 0

    FIREWALL (web-access) # set default-window-height 0

    FIREWALL (web-access) # end

     

    Then you must change your bookmarks to 0 and 0 for height and width and full screen works again.

      Baya
      BayaAuthor
      Visitor III
      April 25, 2022

      Thank you gt1, it worked just fine after upgrading to 7.2.0 (those modifiers cannot be set on older firmware). 

      Bigred38
      Bigred38
      New Member
      July 22, 2022

      Hello,

      I've got the same problem, but when I list configuration with grep window I got :

      set default-window-width 1024
      set default-window-height 768

      set default-window-width 1024
      set default-window-height 768

       

      But when I send : set default-window-height 0

      Unknown action 0

       

      My Firmware version is 7.2

      Terms & ConditionsAccessibility statement