L2TP có thể được sử dụng miễn là các phương tiện đường hầm cung cấp kết nối điểm-điểm theo định hướng gói, có nghĩa là nó làm việc với các phương tiện truyền thông chẳng hạn như chế độ chuyển giao không đồng bộ (ATM), Frame Relay, và . | Securing Your Network with Microsoft Proxy Server Chapter 7 293 Q What does Microsoft recommend its customers do when using Proxy Server concerning connecting to the Internet firewall protection and dynamic packet filtering and assigning permissions A Concerning Internet connections Microsoft recommends that only protected networks be connected. Concerning firewall protection and dynamic packet filtering Microsoft recommends that dynamic packet filtering remain enabled to limit communications outside the network. Finally Microsoft recommends that user-level access controls be put in place and appropriately enforced for all required protocols. Q Does Proxy Server improve network performance and if so how A Proxy Server s caching abilities do indeed improve network performance. This is achieved since obtaining information from cache is must faster that obtaining it from a wide area network WAN or local area network LAN connection. Q On a Windows NT Server computer in what order should I install the latest Service Pack Option Pack Proxy Server Remote Access Service RAS and Internet Explorer A Install the latest Service Pack first followed by Windows Routing and Remote Access Internet Explorer the Option Pack Proxy Server and then reinstall the Service Pack. Q How does SOCKS Proxy differ from WinSock Proxy A With SOCKS application must be built with SOCKS support in mind and SOCKS does not support UDP-based applications like Net Show and VDO live. WinSock on the other hand provides support for both TCP and UDP and supports applications like Real Audio Net Show and AOL. WinSock also supports IPX. Chapter 8 Traffic Filtering on Cisco IOS Solutions in this chapter Access Lists Lock and Key Access Lists Reflexive Access Lists Context-Based Access Control CBAC .
