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Windows 7 introduced a new adapter type called WWAN. The traffic accepted by the NIC is controlled by an NDIS Miniport Driver. The WWAN type bypasses NDIS IM drivers (Network Driver Interface Specification Intermediate driver), so the Client NDIS IM driver fails to receive packets that go in and out WWAN devices. The third party tool that acts as the NDIS IM driver in case of the Cisco IPSec VPN Client is DNE by Citrix.