Hello guys,
I have a very strange issue since a few days.
Here is my setting
Internet --<>---FireWall(Linux box)--<>--LAN (172.16.1.0/24)--<>--EA6700--<>--WireLess Lan (172.16.3.0/24)
On my LAN (172.16.1.0/24) I have got a Synology exporting data using FTP/NFS/CIFS
On my WLAN(172.16.3.0/24) I have got a few Samsung smartphones and a laptop
Everything was working well, and sundenly (I guess after the last EA6700 firmware upgrade) CIFS connectivity is no more working with my samsung devices !!
I tried many things
o switching from 2.4 GHz to 5 GHz and from 5 GHz to 2.4 GHz wireless network with no success
o CIFS/SMB is working from my laptop but no more from my samsung devices
o ftp is working from all devices (laptop/Samsung)
o nfs is working from my laptop ( I did not find anyway to test NFS from my Samsung devices 
)
o wireless networking is working good . . no issue with internet.
please do you have any idea ?? it is very frustrating not being able to use my synology with my samsung devices.
Thanks a lot guys