Skype for Business Edge Access Control is an innovative solution preventing account lockout for organizations that wish to safely connect computers from outside the corporate network to their Skype for Business (Lync) server.
Connecting computers and mobile devices to Edge servers from outside exposes the network to serious risks.
While the main threat is to mobile devices as they are less controlled, connecting desktops, and especially laptops, to Skype for Business services is also risky because this requires access to the Active Directory (AD) and exposes the organization to account lockout issues.
Account lockout might be the result of:
Skype for Business Edge server offers both NTLM and certificate-based authentication (TLS-DSK). This is particularly useful for organizations which fear the usage of credentials that are passing through the Web while using NTLM authentication.
While using certificate authentication, the Skype for Business client requests a certificate on the first authentication request made with the user’s corporate credentials (Kerberos). Once a certificate is set for the client, it is subsequently used for the ongoing authentication process.
Skype for Business Edge Access Control eliminates these threats by blocking failed attempts at the Edge server side before they reach the Active Directory.
This is done by configuring a block-failed login policy that blocks attack attempts from reaching the Active Directory. The policy includes a limited number of allowed failed attempts within a defined period.
By using Skype for Business Edge Access Control, the authentication can be configured to block NTLM and force the certificate authentication, thus achieving a Two Factor Authentication (2FA) process for desktops/laptops outside the corporate network.