Your company has a main office and one branch office. All servers run Windows Server 2003 Service Pack 2 (SP2). The main office has a third-party gateway device named Gateway1. Gateway1 is connected to the internal network and the Internet. Gateway1 supports IPSec. In thebranch office, you have a server named Server1. You create an IPSec policy on Server1. You need to ensure that Server1 can establish an IPSec tunnel to Gateway1. 
What should you use to configure the IPSec policy?（）

You have a VPN server named Server1 and a file server named Server2. Both servers run Windows Server 2003 Service Pack 2 (SP2). VPN clients report that they cannot access shares on Server2 after connecting to Server1. You confirm that VPN clients receive the appropriate IP configurations and that they have permissions to the shared folders on Server2. You need to ensure that VPN clients can access the shares on Server2 when they connect to the network by using a VPN connection. 
What should you do? （）