The rational I was trying to accomplish was as following: Allow access from a remote site, over OpenVPN (TUN interface, over UDP) to my home network. Then, share, using CIFS/Samba some drive on my PC or NAS. The remote/OpenVPN-client site would map that drive, and using that setup would be able to backup his stuff. The reality of it was that copying files failed. Even small (=a few MBs) ones. Then it occurred to me that CIFS wasn't, probably, designed to be used in that way. Am I right, were my expectations unreasonable? Anyone can suggest a nice, user-friendly setup over OpenVPN for this type of application (=remote backup)?