ReadyNAS OS 6.9.4 adds support for binding iSCSI Groups to network adapters. iSCSI Groups can be bound to all visible IP addresses, one ethernet adapter, or one VLAN adapter.
To setup iSCSI Network binding
From the ReadyNAS Admin Page, click the iSCSI tab.
If you don't have an iSCSI group, create one by clicking New Group, configuring any settings, then clicking Create.
Edit the iSCSI group you want to change the network binding for by clicking the Properties button.
Set the Dedicated Link to your desired adapter, then click Apply.
Dedicated Link Options
If set to Any, the iSCSI Group will be available to initiators using any network adapter.
If set to any ethernet adapter or VLAN adapter, the iSCSI Group will only be available to initiators accessible from the specified adapter.
You still need to set which initiators are allowed using Allowed Initiators.