Today we've released UTM 9.508. The release will be rolled out in phases. In phase 1 you can download the update package from our FTP server, in phase 2 we will spread it via our Up2Date servers.
As part of UTM 9.508, the wireless firmware is updated to 11.0.003.
Martin Murray Thanks for the feedback, we will look into adding a UI option for disabling auto_mtu_discovery feature.
Re-imaging your system enables auto_mtu_discovery feature which was previously disabled.
The question I have is, prior to re-imaging your UTM did you update to 9.508 and run into this issue or did you run into this after re-imaging your UTM and then updating to 9.508? What was the original reason for re-imaging your UTM to 9.5?