Windows 7 / Networking

Strong Host Model

When a unicast packet arrives at a host, IP must determine whether the packet is locally destined (its destination matches an address that is assigned to an interface of the host). IP implementations that follow a weak host model accept any locally destined packet, regardless of the interface on which the packet was received. IP implementations that follow the strong host model accept locally destined packets only if the destination address in the packet matches an address assigned to the interface on which the packet was received.

The current IPv4 implementation in Windows XP and Windows Server 2003 uses the weak host model. Windows Vista and Windows 7 support the strong host model for both IPv4 and IPv6 and are configured to use it by default. However, you can revert to the weak host model using Netsh. The weak host model provides better network connectivity, but it also makes hosts susceptible to multihome-based network attacks.

To change the host model being used, use the following Netsh commands (and specify the name of the network adapter).

Netsh interface IPv4 set interface "Local Area Connection" WeakHostSend=enabled
Netsh interface IPv4 set interface "Local Area Connection" WeakHostReceive=enabled

To return to the default settings, use the same command format but disable the WeakHostSend and WeakHostReceive parameters.

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In this tutorial:

  1. Configuring Windows Networking
  2. Usability Improvements
  3. Network And Sharing Center
  4. Network Explorer
  5. How Windows Finds Network Resources
  6. How Windows Publishes Network Resources
  7. How Windows Creates the Network Map
  8. Network Map
  9. Set Up A Connection Or Network Wizard
  10. Manageability Improvements
  11. Network Location Types
  12. Policy-Based QoS
  13. Selecting DSCP Values
  14. Planning Traffic Throttling
  15. Configuring QoS Policies
  16. Configuring System-Wide QoS Settings
  17. Configuring Advanced QoS Settings
  18. Testing QoS
  19. Windows Firewall and IPsec
  20. Windows Connect Now in Windows 7
  21. Core Networking Improvements
  22. Networking BranchCache
  23. How Hosted Cache Works
  24. How Distributed Cache Works
  25. Configuring BranchCache
  26. BranchCache Protocols
  27. File Sharing Using SMB
  28. Web Browsing with HTTP (Including HTTPS)
  29. DNSsec
  30. GreenIT
  31. Efficient Networking
  32. What Causes Latency, How to Measure It, and How to Control It
  33. TCP Receive Window Scaling
  34. Scalable Networking
  35. Improved Reliability
  36. IPv6 Support
  37. 802.1X Network Authentication
  38. Server Message Block (SMB) 2.0
  39. Strong Host Model
  40. Wireless Networking
  41. Improved APIs
  42. Network Awareness
  43. Improved Peer Networking
  44. Services Used by Peer-to-Peer Networking
  45. Managing Peer-to-Peer Networking
  46. Peer-to-Peer Name Resolution
  47. EAP Host Architecture
  48. Layered Service Provider (LSP)
  49. Windows Sockets Direct Path for System Area Networks
  50. How to Configure Wireless Settings
  51. Configuring Wireless Settings Manually
  52. Using Group Policy to Configure Wireless Settings
  53. How to Configure TCP/IP
  54. DHCP
  55. Configuring IP Addresses Manually
  56. Command Line and Scripts
  57. How to Connect to AD DS Domains
  58. How to Connect to a Domain When 802.1X Authentication Is Not Enabled
  59. How to Connect to a Domain When 802.1X Authentication Is Enabled