Description:

Linux/390 has security functionality, however there are a number of reasons to integrate this into CA TOP SECRET with the CA PAM Client for Linux for zSeries product.

Solution:

Reasons to integrate Linux Security with CA TOP SECRET using the CA PAM Client for Linux for zSeries product.

• If you use the Linux security, you have to 'pre' create the id/pswd and home directory before a user can logon. With the PAM Server and client from CA, this is not a requirement. As part of the logon, when the id/pswd is authenticated to CA TOP SECRET, the users home dir, UID and GID is extracted and returned to the PAM client code running on Linux/390. This code dynamically adds the user to the /etc/password file (if so configured) and then creates the home dir if needed. The user is then allowed on to the Linux node with zero Linux administrative effort.
  
  
• Standardization - Since CA TOP SECRET is controlling the home, program, UID and GID, you will have consistent values across all nodes.
  
  
• Source controls - Using CA TOP SECRET's built in source controls, not only can you control which Linux nodes a user can logon to, but the days and time of day.
  
  
• Passwords - Using CA TOP SECRET as a central enterprise security repository, you also get standardized password controls. Min/max length, min # of days before a change, pswd history, etc.
  
  
• Passwords - Using CA TOP SECRET as a central enterprise security repository, the user has a single password value to remember. The user is not required to 'sync' their passwords.
  
  
• Security policy - When trying to create a security policy for an enterprise, there are always the differences in the security of each platform that makes it difficult to have a standard policy. Exceptions are always found. Using CA TOP SECRET as a central enterprise security repository this is no longer an issue.
  
  
• The PAM client will be released as open source from CA. This will allow any client of CA to 'port' the PAM client to any platform that has a PAM framework as part of the operating system. This includes Linux on other platforms such as Intel, Sun Solaris, HP-UX and IBM's AIX. Citing all the reasons above, you can truly start to use CA TOP SECRET as a central enterprise security repository.
  
  
• Employee's leave the company - When employees leave the company, you don't have to run around trying to delete the user account from every node they every logged on to. Suspending/deleting that account from CA TOP SECRET makes sure that every Linux system using our PAM client is secure and that ID can't be (mis)used.
  
  
• Scalable - CA TOP SECRET is very scalable. Using it to control the Linux nodes just adds to it's value.

Just to reiterate reason 1, we worked with a client who was in the process of setting up approximately 1000 Linux/390 LPARs. The administrative effort to maintain user id/pswds in the nodes would require a number of administrators. While a site's organization might not be looking at this many, we will venture a guess and say that we doubt the administrative staff is growing to service security requirements. This alone should be reason enough to add a very thin layer to enhance and centralize the security in a site's environment.

Details on the CA PAM Client for Linux for zSeries can be found at the Support Online web site at: https://support.ca.com; select the "Support by Product" from the Support column to the left, then select "CA PAM Client for Linux for zSeries" from the "Select a Product page" drop down box.

Release:
Component: AWAGNT