Implementing Security for IMS › Define CA Top Secret to IMS › Enable the Signon Screen (Optional)

Enable the Signon Screen (Optional)

DFSMO1 and DFSMO2 are normally employed for static terminal signon to pass online CA Top Secret messages back to the end user. These MFS format members are supplied by IMS during Stage 2 IMS Generation. Normally, the default DFSMO1 is deployed for single line signon message returns (usually errors). DFSMO2 is deployed for multiple line signon message returns (usually a success).

For ETO terminals, format DFSIGNP is presented when an un-generated terminal connects to the IMS region. DFSIGNP is created during Stage 2 IMS generation. DFSIGNP, DFSMO1, and DFSMO2 may be used to pass messages and return codes back to the IMS terminal user.

When an ETO terminal is connected to IMS before successful signon:

• It can only issue the commands:

  /SIGN
  /RCL
  

• It cannot execute transactions

The format DFSIGNP:

• Generates the implicit command:

  /SIGN ON
  

• Processes the command normally when the screen is entered

You can customize these "signon" format members, but must conform to IMS specifications. A customized version of DFSMO1 is supplied in the TSSOPMAT library. Customization of IMS signon formats is the responsibility of the administrator. For information, see the documents for the IMS Message Formatting Services supplied for your current release of IMS.