It has conflict with some network component in MacOS Sierra. I cannot connect to file server anymore, at least by smb and ajp protocol. After removing kernel extensions of tuntap, I am able to connect bt smb/afp protocol again.
Do you have VirtualBox installed on you macOS, I found tap.kext conflict with VBoxNetAdp.kext. If these two modules installed, I cannot access windows file server. remove any one fix the problem. https://forums.virtualbox.org/viewtopic.php?f=8&t=83587
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Do you have VirtualBox installed on you macOS, I found tap.kext conflict with VBoxNetAdp.kext. If these two modules installed, I cannot access windows file server. remove any one fix the problem.
https://forums.virtualbox.org/viewtopic.php?f=8&t=83587