I'm planning on buying a NAS to store many data (with RAID5), but I need to deal with a weird network. The main PC I'm using that generates data is running on Windows XP, and for security reasons shouldn't be connected to the Internet. Other computers, up-to-date, run on several OS. These computers are all on a local network + access to Internet.
I was wondering if I could use a NAS with two Ethernet ports to get what I wanted: - connect the NAS first Ethernet port to the local network such that up-to-date computers could access it; - use a direct connection between the NAS and the old PC (with winXP) on the second Ethernet port (with an other router if necessary).
Would it work? Will my old PC be safe, i.e. still not connected to the web? Do you have any recommendation in NAS model? I was considering the QNAP-TS431+, but I'm not decided yet, and I don't know much about these devices.
I join a sketch of the network I'm considering, to help visualizing.
Imagined network with NAS: