Allowing a 2 NIC Windows Server, different subnets, to pass traffic between the NICs.

Can I do this?
A windows 2016 server with 2 NICs.
NIC A is on the corporate LAN ( and has Internet access and is used by LAN PCs to the VMs on it.
NIC B is on a "SAN" that is on a completely different range ( This is for 10Gbe iSCSI and is a separate subnet and stores a VHD for Hyper V.

The storage device on the "SAN" side requires internet access to "call home" with emails (a 365 hosted SMTP server) for alerting and also to the local LAN to communicate with an APC that has an NMC card in it on the NIC A corporate LAN.

How do I get the storage device on NIC B to have it's internet &  corporate LAN bound traffic passed over to NIC A and dealt with appropriately?

Andy HowardSupportAsked:
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Cliff GaliherCommented:
Normally you wouldn't. A good SAN device will always have at least two NICs. One for storage traffic, and one for traditional traffic. You never want to have storage traffic on the same network as internet traffic.

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Andy HowardSupportAuthor Commented:
Hi Cliff. I like your response as the storage device does have multiple NICs. I simply wasn't sure what best practice is. I wanted to avoid directly connecting the device to the corporate network for data security reasons even though it seems the simplest way. BUT having read your comment, I realize now that by using one of the available 1Gbe connections direct to the company LAN it will ensure any traffic load is handled by that NIC and not the 10Gbe whereas a solution to my actual question would have placed extra load on the 10Gbe side.
I will do the 1Gbe but use VLANS.
Bill BachPresident and Btrieve GuruCommented:
I would concur with Cliff Galiher.  In addition, I would argue that you should actually have a dedicated router to handle this task, so that you can ALSO enable a firewall there and prevent any cross-network attacks from accessing the SAN.  

However, Windows can handle this for you, if you really want to do it.  Here's a short form:
1) Set up both NIC's.  I assume this is already done.
2) Enable the Remote Access Server Role, with the Routing role service.
3) In the Server Manager, open the Routing and Remote Access console.
4) Right-click the server name and select Configure and Enable....
5) Click on Custom Configuration (even Microsoft doesn't want to make this easy) and enable LAN Routing.
6) Double-check your firewall configuration to make sure that you can communicate successfully.
Andy HowardSupportAuthor Commented:
Thanks Chris & Bill. This is all the help I need,
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Windows Server 2016

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