SMB 2.0 protocol support
SMB 1 was the protocol exploited by wannacry. The Eternal Blue exploit used by the wannacry devs is primarily foiled by disabling smb1. SMB 2 is an essential protocol.
Jim Tonti commented
Windows 10 shares are nearly impossible to connect to, as SMB 1 is disabled (for good reason!) by default. Please consider SMB 2 implementation.
The smb1 protocol is nearly 30 years old and insecure