https://bugzilla.samba.org/show_bug.cgi?id=14713 --- Comment #34 from Ronnie Sahlberg <ronniesahlberg@xxxxxxxxx> --- Signing. It is not required on the server config, BUT in 3.1.1 signing is required for all TreeConnect calls (0x03) always, by the protocol. In 3.0 and 3.0.2 signing is required for all Ioctl:fsctl_validate_negotiate_info calls. Also by protocol requirements. The command code for Ioctl is 0x0b, which you saw in the log. At least it got the mount process a bit further by using vers=3.0 since we got past the TreeConnect. I forgot that in 3.0 we have that Ioctl call. It could have worked, but I forgot about the Ioctl :-( Anyway, this is another datapoint that tells us that the issue is that it is related to the session key imo. -- You are receiving this mail because: You are the QA Contact for the bug.