Added infos on Vista loopback connection handling.
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@ -24,3 +24,22 @@ approach often described as IP-Aliasing was primarily choosen because it avoids
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putting the network interface into promiscuous mode. The major benefit of this
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putting the network interface into promiscuous mode. The major benefit of this
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is the compatibility with WLAN interfaces - which mostly come with Windows
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is the compatibility with WLAN interfaces - which mostly come with Windows
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device drivers incapable of promiscuous mode.
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device drivers incapable of promiscuous mode.
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The WinPcap library works fine with the 'Microsoft Loopback Adapter' so it's
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easy to have a Contiki network application running on Windows communicate with
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the local Windows instance for testing purposes - and monitor the communication
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with Wireshark.
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Windows Vista however tries to identify networks by the MAC address of the
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default router. If that fails the network is defined as an 'Unidentified
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Network' and thus classified as 'Public Network' resulting in very strict
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firewall settings. As there's no default router for a loopback interface the
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interface is always considered as a public network - which is kind of the
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opposite of the actual situation ;-)
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Instead of fiddling with the firewall settings for 'Public Networks' (or even
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turning the firewall completely off) there's a clean solution which defines the
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loopback interface as not a true network interface that connects to a network.
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This results in generally deactivating both the network identification process
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and the firewall for the loopback interface. The details are available at
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http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=1960546
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