SonicWall: Configure a Firewall (TZ series) to Permit WSUS Downloads

Occasionally, SonicWall firewalls will block WSUS downloads. You can correct this by accessing a "hidden" page in the SonicWall interface, as follows:

1.Logon to the SonicWall interface.
2.Change the file name at the end of the URL to diag.html.
3.Check the "Enable HTTP Byte-Range requests with Gateway AV" checkbox.
4.Click the Apply button to save changes.

Víele Grüße Arnd Rößner

Quelle: Fieldbrook