Daylight Worksheet - Security of Servers ...SHOW HINTS

The Daylight servers maintain a list of allowed users similar to but separate from the operating system's. A list of allowed hosts is maintained also. The sthorman program is an administrative tool which can modify this security configuration.

• Adding an allowed user:
  1. Start the sthorman program. Specify user thor and service thor.

  2. Go to the Change server security menu. Select Add/Change user.

  3. Specify a user. Note that several Daylight client applications use the unix login as a default Daylight user. Thus, it is convenient to use your unix login as a Daylight user-name also.

  4. Specify a password for the new user. The null password may be used if desired.

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• Adding an allowed host: An allowed host may be added in a similar fashion. Then any users from this host may connect to the Daylight servers.

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• Equivalent hosts mode vs. Restricted hosts mode - Server security may be in one of these two modes. In equivalent hosts mode, if a host is listed as allowed, any user from that host may connect with no server password. Allowed users may connect from any host. In restricted hosts mode, only allowed hosts may connect and only allowed users. Toggle the mode with sthorman and test that the servers comply.

Note that the security configuration is stored in the file specified by environment variable $DY_DATABASE_PASSWORDS_FILE, in our case at /daylight/dy_passwords.dat. You may inspect this file to see the effects of these changes.