AGate (for application gateway) is the major component of the Internet
Transaction Server (ITS) from SAP, the software company that provides
a popular set of programs for managing a large enterprise. The AGate,
along with the WGate (for Web gateway), performs the tasks that enable
an end user to access a SAP R/3 application over the Internet. The WGate
establishes the connection between ITS and the Web server and forwards
user requests to the AGate, which establishes the connection to the R/3
system and performs processing tasks that are required to move data between
R/3 applications and the Internet. The WGate resides on the same computer
as the Web server, as a server extension. Although the AGate can reside
on that computer as well, SAP suggests that it is better located on a
different system, in the interests of efficiency and security. The AGate
and the WGate communicate using TCP/IP through the SAP Network Interface
(NI).
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