A rede corporativa deve ter suporte a IPv6, de acordo com o link
For end-to-edge protection, as shown in Figure 3, DirectAccess clients establish an IPsec session to an IPsec gateway server (which by default is the same computer as the DirectAccess server). The IPsec gateway server then forwards unprotected traffic, shown in red, to application servers on the intranet. This architecture does not require IPsec on the intranet and works with any IPv6-capable application servers.