Remote Access Policies 1
Remote access policies are an ordered set of rules that define how connections are either accepted or rejected. For connections that are accepted, remote access policies can also define connection restrictions. For each rule, there are one or more conditions, a set of profile settings, and a remote access permission setting. Connection attempts are evaluated against the remote access policies in order to determine whether the connection attempt matches all the conditions of each policy. If the...
Certificate Revocation and EAPTLS Authentication
By default, the authenticating server checks for certificate revocation for all the certificates in the certificate chain sent by the VPN client during the EAP-TLS authentication process. If certificate revocation fails for any of the certificates in the chain, the connection fails authentication and is rejected. The certificate revocation check for a certificate can fail because of the following reasons The certificate has been revoked. The issuer of the certificate has explicitly revoked the...
PPP Logging
All Microsoft VPN protocols are based on PPP negotiations, so there is a definite need to understand the PPP process and know how to troubleshoot it. We provide a complete sample of a PPP negotiation log on the companion CD so that you can compare your own logs to it. PPP logging records the series of programming functions and PPP control messages during a PPP connection, and it's a valuable source of information when you are troubleshooting the failure of a PPP connection. To enable logging of...
Use the netsh ras add registeredserver command or
Add the computer account of the IAS server to the RAS And IAS Servers security group by using the Active Directory Users And Computers snap-in. If the IAS server is to authenticate and authorize VPN connection attempts for user accounts in other domains, verify that the other domains have a two-way trust with the domain in which the IAS server computer is a member. Next, configure the IAS server computer to read the properties of user accounts in other domains by using the netsh ras add...
Routing
By its very nature and purpose, the VPN server is an IP router. This is because it connects two or more network subnets in this case, the Internet and the intra-net and, as such, must be properly configured with the set of routes that makes all locations reachable. Specifically, the VPN server needs the following On the Internet-attached interface, a default route that points to a firewall or router directly connected to the Internet. This route makes all locations on the Internet reachable....
Unable to Connect
The Unable to connect problem is a broad one. With all the different pieces involved in negotiating a VPN session, the connection problems can come from many areas. The good news is that Windows has all the functionality built into the base operating system, so you do not need to worry about third-party interoperability issues. When a VPN client is unable to connect, check the following Using the ping command when connected to the Internet, verify that the host name for the VPN server is being...
VPN Interoperability
The Microsoft Windows Server 2003 family of operating systems and all of the Windows VPN client operating systems have integrated virtual private network VPN technology that helps provide secure, low-cost remote access and branch office connectivity over the Internet. Windows Server 2003 virtual private networking has been designed to interoperate with VPN software and devices that support industry standards for secure remote access. Windows XP and down-level clients all have built-in support...