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There are different ways to configure RDP scaling inside FortiOS:
- Under the SSL VPN web portal:
config vpn ssl web portal
edit "RDP_Portal"
set tunnel-mode enable
set web-mode enable
set ip-pools "SSLVPN_TUNNEL_ADDR1"
config bookmark-group
edit "gui-bookmarks"
config bookmarks
edit "RDP"
set apptype rdp
set host "192.168.1.1"
set port 3389
set width (0-65535, default = 0)
set height (0-65535, default = 0)
next
end
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Under Personal or User group bookmarks:
conf vpn ssl web [user-group-bookmark | user-bookmark]
edit "fortinet#"
config bookmarks
edit "RDP-BOOKMARK"
set apptype rdp
set host "10.10.10.10"
set port 3389
set width (0-65535, default = 0)
set height (0-65535, default = 0)
next
end
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Under the SSL VPN web portal:
edit "RDP_Portal"
set tunnel-mode enable
set web-mode enable
set ip-pools "SSLVPN_TUNNEL_ADDR1"
set default-window-width 0 (default 1024)
set default-window-height 0 (default 768)
end
It is necessary to have web-mode enabled on the portal to see the 'default-window' settings.
To achieve full screen when using RDP, these settings and the bookmark settings must be set to 0 as explained in scenario 3 which will scale with a full-screen browser window.
There are three factors which decide the final outcome of how RDP will scale:
- If width & height settings under the bookmark are non-zero values, then these values will be used.
- If the width & height settings under the bookmark are zero and the width/height settings under the portal are not zero, then FortiOS will use the setting configured under the portal.
- If width & height settings are zero under both bookmark and portal, then RDP will auto-scale based on individual users' browser's window size.
For users with small displays, such as a 13-inch screen display, sometimes the black bars appear at the top and the bottom of the page, even after the above changes.
To display full screen for such devices, proceed with the following steps :
- Press F11 and login in the Portal.
- Then, the display scale to the F11 (Fullscreen).
Afterward, it should be possible to use the whole display.
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