Unified Access Gateway is an appliance that is normally installed in a demilitarized zone (DMZ). Unified Access Gateway is used to ensure that the only traffic entering the corporate data center is traffic on behalf of a strongly authenticated remote user.
Unified Access Gateway directs authentication requests to the appropriate server and discards any unauthenticated request. Users can access only the resources that they are authorized to access.
Unified Access Gateway also ensure that the traffic for an authenticated user can be directed only to desktop and application resources to which the user is actually entitled. This level of protection involves specific inspection of desktop protocols and coordination of potentially rapid changing policies and network addresses, to accurately control access.
Unified Access Gateway acts as a proxy host for connections inside your company's trusted network. This design provides an extra layer of security by shielding virtual desktops, application hosts, and servers from the public-facing Internet.
Unified Access Gateway is designed specifically for the DMZ. The following hardening settings are implemented.
Up-to-date Linux Kernel and software patches
Multiple NIC support for Internet and intranet traffic
Disabled FTP, Telnet, Rlogin, or Rsh services
Disabled unwanted services