SSL - Terrible speed

Reaching out here before calling support as its tricky to try and solve this with users connected and having to get them to redownload config files for changes. 

Running 17.5.7. We have TCP enabled and get about 1.5MB/ps on SMB share access.  We tried changing to UDP which bumped us to 2.4MB/ps.  We have a 500Mb connection.  Our other settings are as follows.  Any recommendations to try and get this up?

Compression off

AES-128-CB

SHA2 256

2048Bit