vb.net generate barcode image For L2TP/IPSec connections, verify that computer certificates, also known as in C#

Printer PDF417 in C# For L2TP/IPSec connections, verify that computer certificates, also known as

For L2TP/IPSec connections, verify that computer certificates, also known as
PDF-417 2d Barcode Maker In Visual C#.NET
Using Barcode encoder for VS .NET Control to generate, create PDF417 image in Visual Studio .NET applications.
www.OnBarcode.com
PDF-417 2d Barcode Scanner In Visual C#.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
machine certificates, are installed on the VPN client and the VPN server.
Barcode Printer In Visual C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create bar code image in VS .NET applications.
www.OnBarcode.com
Barcode Decoder In Visual C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
If the VPN server is configured with a static IP address pool, verify that there
Making PDF-417 2d Barcode In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications.
www.OnBarcode.com
PDF417 Maker In VS .NET
Using Barcode encoder for VS .NET Control to generate, create PDF-417 2d barcode image in VS .NET applications.
www.OnBarcode.com
are enough addresses. If all the addresses in the static pool have been allocated to connected VPN clients, the VPN server is unable to allocate an IP address for TCP/IP-based connections and the connection attempt is rejected. If the VPN server is using DHCP to allocate addresses, another issue to check for is whether the VPN server is handing out valid addresses. For example, if the VPN server cannot contact the DHCP server to get IP addresses, it could start handing out automatic private addressing in the Automatic Private IP Addressing (APIPA) address range from 169.254.0.1 through 169.254.255.254. This is not a valid range for remote access connectivity. If this problem is occurring, check the DHCP/VPN server interactions to make sure DHCP requests are being resolved and then have anyone with an APIPA address re-establish the VPN connection to get a valid IP address.
Encode PDF-417 2d Barcode In Visual Basic .NET
Using Barcode creator for .NET framework Control to generate, create PDF417 image in Visual Studio .NET applications.
www.OnBarcode.com
Code-39 Drawer In Visual C#.NET
Using Barcode encoder for .NET Control to generate, create Code 3/9 image in .NET framework applications.
www.OnBarcode.com
Verify the configuration of the authentication provider. The VPN server can
Print 2D Barcode In Visual C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create Matrix Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Make Data Matrix In Visual C#
Using Barcode encoder for .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
be configured to use either Windows or RADIUS to authenticate the credentials of the VPN client.
Generate PDF417 In Visual C#
Using Barcode maker for .NET framework Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
4-State Customer Barcode Drawer In C#
Using Barcode generator for .NET Control to generate, create Intelligent Mail image in VS .NET applications.
www.OnBarcode.com
For RADIUS authentication, verify that the VPN server computer can communicate with the RADIUS server.
Printing PDF-417 2d Barcode In None
Using Barcode creation for Online Control to generate, create PDF417 image in Online applications.
www.OnBarcode.com
Code128 Decoder In Visual C#
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
For a VPN server that is a member of a native-mode domain, verify that the
Barcode Creator In None
Using Barcode creation for Office Word Control to generate, create barcode image in Office Word applications.
www.OnBarcode.com
Make UCC - 12 In Objective-C
Using Barcode printer for iPhone Control to generate, create EAN 128 image in iPhone applications.
www.OnBarcode.com
VPN server has joined the domain.
QR Code Printer In None
Using Barcode drawer for Office Excel Control to generate, create QR Code image in Microsoft Excel applications.
www.OnBarcode.com
Bar Code Scanner In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
For either a Windows NT 4.0 Service Pack 4 and later VPN server that is a
Bar Code Generation In Java
Using Barcode generator for Android Control to generate, create barcode image in Android applications.
www.OnBarcode.com
Code-128 Reader In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
member of a mixed-mode domain or a Windows Server 2003 VPN server that is a member of a Windows NT 4.0 domain that is accessing user account
11
Troubleshooting Remote Access VPN Connections |
properties for a user account in a trusted Active Directory domain, verify that the Everyone group is part of the Pre-Windows 2000 Compatible Access group by using the net localgroup Pre-Windows 2000 Compatible Access command. If it is not, issue the net localgroup Pre-Windows 2000 Compatible Access everyone /add command on a domain controller computer and then restart the domain controller.
For a Windows NT 4.0 Service Pack 3 and earlier VPN server that is a member of a mixed-mode domain, verify that the Everyone group has been granted list contents, read all properties, and read permissions to the root node of your domain and all sub-objects of the root domain.
For PPTP connections using MS-CHAP and attempting to negotiate 40-bit
Microsoft Point-to-Point Encryption (MPPE) encryption, verify that the user s password is not longer than 14 characters.
Verify that packet filtering on a router or firewall interface between the VPN
client and the VPN server is not preventing the forwarding of tunneling protocol traffic. See Appendix B for information on the types of traffic that must be allowed for PPTP and L2TP/IPSec traffic. On a Windows Server 2003 based VPN server, IP packet filtering can be separately configured from the advanced TCP/IP properties and from the properties of an interface under IP Routing in the Routing And Remote Access snap-in. Check both places for filters that might be excluding VPN connection traffic.
Verify that the Winsock Proxy client is not currently running on the VPN client.
When the Winsock Proxy client is active, Winsock application programming interface (API) calls such as those used to create tunnels and send tunneled data are intercepted and forwarded to a configured proxy server. A proxy server based computer allows an organization to access specific types of Internet resources (typically Web and file transfer protocol [FTP]) without directly connecting that organization to the Internet. The organization can instead use private IP network IDs (such as 10.0.0.0/8, 172.16.0.0/ 12, and 192.168.0.0/16). Proxy servers are typically used so that private users in an organization can have access to public Internet resources as if they were directly attached to the Internet. VPN connections are typically used so that authorized public Internet users can gain access to private organization resources as if they were directly attached to the private network. A single computer can act as a proxy server (for private users) and a VPN server (for authorized Internet users) to facilitate both exchanges of information.
PART III
VPN Troubleshooting
L2TP/IPSec Authentication Issues
The most common problems that cause L2TP/IPSec connections to fail are discussed in the list below. A typical Oakley log for an L2TP/IPSec connection can be found on the companion CD-ROM, which you can compare to your own.
No certificate. By default, L2TP/IPSec connections require that the remote
access server and remote access client exchange computer certificates for IPSec peer authentication. Check the Local Computer certificate stores of both the remote access client and remote access server using the Certificates snap-in to ensure that a suitable certificate exists.
Copyright © OnBarcode.com . All rights reserved.