|Hello, this is mainly an answer for the last TechNut question.|
I have a quite similar situation as mudgalbharat, but with 3 NICs (1x100BaseT, 1x1000BaseT, 1 Wireless 802.11bg).
I need the 3 NICs because:
1- Each NIC is connected to a specific private LAN (192.168.x.x)
2- In normal case, the LANs must not be connected. This is the easy way to manage the data bandwidth usage and reduce any risk of data congestion due to fact than: i) one LAN have a constant bandwidth usage of 25Mbps, ii) an other LAN have a constant bandwidth usage of 500Mbps and iii) the last LAN have a constant bandwidth usage of 5 Mbps.
3- On a sub-LAN, some IP devices on a sub-LAN does not require an Internet access, and more they shouldn't be accessed from Internet (no visibility, no ping, no scan port,...). Why ? because for example, they are 'off-line' saving devices, or they are multimedia materials without diffusion licensing.
To come back on the discussion subject, I have checked myself many configurations (2 NICs, 3 NICs,...) then I can confirm that the problem is present if the Pc is only a workstation (even if we don't need all network's management functions).
To complete the last suggestion (static IP+no gateway), I can propose: add some static routing on networks.
Even if it seems not sufficent, the basic set of rules shall be:
- 1 rule for access by the Wireless interface and its GW to all non-LAN address
- 1 rule for private LAN (192.168.x.x) by the 192.168.x.x interface (all 192.168.x.x messages must be transmetted to 192.168.1.1 that must manage the routage to the ending destinations).
Best regards, JaI