create barcode with c# Registry Settings to Harden Winsock in C#.NET

Making QR in C#.NET Registry Settings to Harden Winsock

Registry Settings to Harden Winsock
Encoding QR Code In Visual C#.NET
Using Barcode printer for .NET framework Control to generate, create QR Code ISO/IEC18004 image in .NET framework applications.
www.OnBarcode.com
QR Code Recognizer In Visual C#
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Data (DWORD) 10 1 20 20,000
Encode Barcode In C#
Using Barcode printer for Visual Studio .NET Control to generate, create barcode image in .NET applications.
www.OnBarcode.com
Recognizing Bar Code In Visual C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Using TCP/IP Filtering
Generate QR In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
www.OnBarcode.com
Denso QR Bar Code Printer In Visual Studio .NET
Using Barcode printer for Visual Studio .NET Control to generate, create QR Code 2d barcode image in .NET applications.
www.OnBarcode.com
Windows Server 2003, Windows 2000, and Windows XP include support for TCP/IP filtering, a feature known as TCP/IP Security in Microsoft Windows NT 4.0. TCP/IP filtering allows you to specify which types of inbound local host IP traffic are processed for all interfaces. This feature prevents traffic from being processed by the computer in the absence of other TCP/IP filtering, such as that provided by Routing and Remote Access (RRAS), Windows Firewall (in Windows XP and Windows Server 2003 SP1), and other TCP/IP applications or services. TCP/IP filtering is disabled by default. When configuring TCP/IP filtering, you can permit either all or only specific ports or protocols listed for TCP ports, UDP ports, or IP protocols. Packets destined for the host are accepted for processing if they meet one of the following criteria:
QR Code Generation In VB.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in Visual Studio .NET applications.
www.OnBarcode.com
EAN128 Encoder In Visual C#
Using Barcode encoder for VS .NET Control to generate, create EAN / UCC - 14 image in .NET applications.
www.OnBarcode.com
The destination TCP port matches the list of TCP ports. The destination UDP port matches the list of UDP ports. The IP protocol matches the list of IP protocols. The packet is an ICMP packet.
Encoding ECC200 In C#
Using Barcode generation for VS .NET Control to generate, create Data Matrix ECC200 image in VS .NET applications.
www.OnBarcode.com
Painting Barcode In C#
Using Barcode drawer for Visual Studio .NET Control to generate, create bar code image in .NET applications.
www.OnBarcode.com
19:
Barcode Maker In C#.NET
Using Barcode creation for .NET framework Control to generate, create barcode image in .NET framework applications.
www.OnBarcode.com
Uniform Symbology Specification ITF Creator In C#
Using Barcode maker for .NET Control to generate, create ITF image in .NET framework applications.
www.OnBarcode.com
Implementing TCP/IP Security
Decode Bar Code In C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
PDF 417 Encoder In Java
Using Barcode generation for BIRT Control to generate, create PDF 417 image in Eclipse BIRT applications.
www.OnBarcode.com
Note
Barcode Maker In Java
Using Barcode drawer for Android Control to generate, create barcode image in Android applications.
www.OnBarcode.com
GS1 DataBar Limited Printer In .NET Framework
Using Barcode printer for .NET Control to generate, create GS1 DataBar Limited image in Visual Studio .NET applications.
www.OnBarcode.com
TCP/IP port filtering applies to all interfaces on the computer and cannot be applied on a per-adapter basis. However, you can configure allowed ports and protocols on a peradapter basis.
Paint Bar Code In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create bar code image in ASP.NET applications.
www.OnBarcode.com
Draw Code128 In .NET
Using Barcode creator for .NET framework Control to generate, create Code-128 image in VS .NET applications.
www.OnBarcode.com
In addition to being able to configure TCP/IP filtering in the Options tab of the TCP/IP advanced properties in the user interface, you can apply the settings directly to the registry. Table 19-6 lists the registry values to configure TCP/IP filtering. TCP/IP filtering is set in the key HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters, whereas the specific settings for each interface are configured in the key HKLM\SYSTEM\CurrentControlSet\ Services\Tcpip\Parameters\Interfaces\Interface_GUID.
UCC-128 Drawer In None
Using Barcode generator for Software Control to generate, create EAN / UCC - 13 image in Software applications.
www.OnBarcode.com
Decode ECC200 In VS .NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Table 19-6 Setting EnableSecurityFilters UdpAllowedPorts
Registry Values for TCP/IP Filtering
Type DWORD MULTI_SZ Description 1 enables TCP/IP filtering; 0 disables TCP/IP filtering. 0 allows all UDP ports; an empty (null) value blocks all UDP ports; otherwise, the specific allowed UDP ports are listed. 0 allows all TCP ports; an empty (null) value blocks all TCP ports; otherwise, the specific allowed TCP ports are listed. 0 allows all IP protocols; an empty (null) value blocks all IP protocols; otherwise, the specific allowed IP protocols are listed.
TCPAllowedPorts
MULTI_SZ
RawIpAllowedProtocols
MULTI_SZ
Using Windows Firewall in Windows Server 2003 and Windows XP
Windows Server 2003 and Windows XP both include a personal firewall called Internet Connection Firewall (ICF) in their initial release. Its much improved successor, called Windows Firewall, was released in Windows Server 2003 Service Pack 1 and Windows XP Service Pack 2. Windows Firewall is a stateful firewall it monitors incoming traffic received by the network adapter that it is running and other hosts, and it inspects the source and destination address of each message that it handles. To prevent unsolicited traffic from the public side of the connection from entering the private side, Windows Firewall keeps a table of all communications that have originated from the Windows Firewall computer. When used in conjunction with Internet Connection Sharing (ICS), Windows Firewall creates a table for tracking all traffic originated from the Windows Firewall/ICS computer and all traffic originated from private network computers. Inbound Internet traffic is allowed to reach the computers in your network only when a matching entry in the table shows that the communication exchange originated within your computer or private network or is permitted by rule to an application or port.
Part III:
Security
Windows Firewall improves on ICF, which operated on a binary basis, either off or on, by adding an option to enable the firewall but not allow exemptions to the packet filtering. This mode blocks all unsolicited inbound traffic. As an administrator, you can determine whether users, even if they are not local administrators, can enable Windows Firewall through the Group Policy option Prohibit Use Of Internet Connection Firewall on Your DNS Domain NSNetwork, which is listed in the computer portion of Group Policy under Administrative Templates, Network, Network Connections. Additionally, through the use of profiles, network administrators can configure Windows Firewall settings to be different (presumably more relaxed) when connected to the corporate network. The two profiles that are added to Group Policy in Windows XP SP2 and Windows Server 2003 SP1 are the Domain profile and the Standard profile. The client computer determines whether it is connected to the corporate network by using the Network Location Awareness (NLA) system service. When the client computer starts up, the NLA service compares the connection-specific DNS suffix of the connection it received from Group Policy to the domain suffix of the domain to which the computer belongs. If the two match, NLA judges that the computer is connected to the corporate network, and the domain profile is applied. Because the DNS suffix is generally provided by the Dynamic Host Configuration Protocol (DHCP) server from which the computer gets its IP address, the use of profiles should not be used on networks that require a great degree of security. An attacker with ample resources could potentially force a client computer into the domain profile if she has sufficient knowledge of the target s network. Although this scenario is remote at best, it is worth considering the security conditions under which your network operates. Using Windows Firewall, you can create exceptions by defining which programs and services are allowed to receive unsolicited traffic from other computers. Exceptions configured through programs and services are global on the system, whereas exceptions configured through services are interface specific. For programs and services, which can be configured locally or through Group Policy, Windows Firewall enables you to create an exception when traffic originates on the local subnet or from within a pre-defined range of IP addresses, but it blocks the traffic when the traffic originates from remote networks. Figures 19-2 and 19-3 show the configuration of the predefined File And Printer Sharing exception, which restricts the scope of the exception to the local subnet. If an application needs to receive unsolicited traffic when Windows Firewall is enabled and is blocked by Windows Firewall, the operating system will prompt the user to grant the application executable a specific exception to the rule. You can also add applications to the Programs and Services list by the name of the executable rather than having to create a static, always open port such as was required in the Internet Connection Firewall. By default, File And Printer Sharing and Remote Assistance are permitted as long as the session originates on the local subnet.
19:
Copyright © OnBarcode.com . All rights reserved.