Use c# to achieve on the packet filtering firewall, the features are filtered according to a number of IP addresses do not want to get the packet

packet filtering firewall\IP数据包过滤.sln
.........................\IP数据包过滤.suo
.........................\SimpleSniff\App.cs
.........................\...........\MainForm.cs
.........................\...........\MainForm.Designer.cs
.........................\...........\MainForm.resx
.........................\...........\SimpleSniff.csproj
.........................\...........\SimpleSniff.csproj.user
.........................\...........\VeryCD.ico
.........................\...........\Properties\AssemblyInfo.cs
.........................\...........\..........\Resources.Designer.cs
.........................\...........\..........\Resources.resx
.........................\...........\..........\Settings.Designer.cs
.........................\...........\..........\Settings.settings
.........................\...........\obj\Debug\SimpleSniff.csproj.FileListAbsolute.txt
.........................\...........\...\.....\SimpleSniff.exe
.........................\...........\...\.....\SimpleSniff.Properties.Resources.resources
.........................\...........\...\.....\SimpleSniff.SniffWindow.resources
.........................\...........\...\.....\SimpleSniff.csproj.GenerateResource.Cache
.........................\...........\...\.....\SimpleSniff.pdb
.........................\...........\imag\VeryCD.ico
.........................\...........\bin\Debug\SimpleSniff.exe
.........................\...........\...\.....\SimpleSniff.pdb
.........................\...........\...\.....\SimpleSniff.vshost.exe
.........................\...........\...\.....\SimpleSniff.vshost.exe.manifest
.........................\...........\SniffSocket.cs
.........................\...........\obj\Debug\TempPE
.........................\...........\...\.....\Refactor
.........................\...........\...\Debug
.........................\...........\bin\Debug
.........................\...........\Properties
.........................\...........\obj
.........................\...........\imag
.........................\...........\bin
.........................\SimpleSniff
packet filtering firewall

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