Hello, I may have opportunity to obtain a Intel EXPI9404PTLBLK PRO/1000 PT Quad Port ethernet adapter at a significantly reduced price. What I would like to do with it, I want to make sure it is possible and sane before I buy it. -=- Device sits in CentOS box that connects directly to Internet via onboard network adapter. It pretty much only acts as a NAT router + dhcp server + unbound recursive DNS for the private networks. The four ethernet interfaces on the Intel adapter then : Private Network A: 192.168.10.0/24 Private Network B: 192.168.20.0/24 Private Network C: 192.168.30.0/24 Private Network D: 192.168.40.0/24 A will have a NAS. I can reach it from Internet (via port forwarding) and B and C (routing table) but from it, I can not connect to Internet or B, C, D. That network which likely will only have a few devices can not initiate connection to Internet or the other networks. B is my trusted home network. It can connect to Internet (NAT) and to A (port forwarding) but can not reach C or D C is untrusted home network. Things like my TV and Bluray player that need Internet access but that I don't want to have the ability to reach anything on B, but I do want them to be able to talk to NAS on A via port forwarding. I'm always paranoid about those devices on my network, I don't trust what they are doing. Call it tin foil but I don't trust them. Yet they don't work right without access to Internet (updates / netflix) D when used is network for guests (will have cheap wifi attached), it only talks to Internet via straight NAT and can not talk to private networks A, B, C -=- Is this sane ?