With emulator products, the traditional method of authenticating the user is through user ID and password which is kept in sync with the host access control facility (RACF®, ACF/2, AS/400® user management, etc.). The Express® Logon Feature (ELF) simplifies user ID and password administration for users signing on to SNA applications using Telnet. ELF allows a user to use an SSL-authenticated X.509 certificate for authentication to the SNA application instead of using a user ID and password. ELF requires IBM® Host Integration software. The Host Integration requirements depend on the configuration.
There are two network designs available; a two-tier or a three-tier approach. Both are discussed in Express Logon Feature.