This used to work fine - no issues whatsoever. We have not changed anything in our environment except a SonicWall firmware applied at the beginning of April.
We have 4x Windows 11 PCs at the main site and a Synology NAS at the remote site. We were using Windows backup to backup sys images of each PC to a shared folder on the NAS. We have 1Gb/1Gb lines at both sites.
Since the beginning of April, as soon as the backup starts running, our Papercut Ricoh printers at the main site lose connection with the Papercut server VM (port 9192) that is sitting in Azure - there is another vpn tunnel setup on the same sonicwall.
As soon as the backup is stopped, they reconnect.
So we tried using VEEAM backup instead, and using the traffic throttling setting reduced down as far as 50mbps - still the same issue.
What has changed in the SonicWall firmware?
Is the DPI/IDS/IPS struggling to work with the backup traffic?