Specifying the Internet domain

Use the cookieDomain attribute to specify the domain of the cookie used to mark a user as logged-in. You use cookieDomain if you have a clustered environment (for example, www.acme.com, www2.acme.com, and so on). This lets the cookie work for all computers in the cluster. For example, to ensure that the cookie works for all servers in the acme.com domain, specify cookieDomain=".acme.com". To specify a domain name, start the name with a period.

Important: Before setting the cookie domain, consider the other applications or servers in the broader domain might have access to the cookie. For example, a clustered payroll application at payroll1.acme.com, payroll2.acme.com, and so on, might reveal sensitive information to the test computer at test.acme.com, if the cookie domain is broadly set to “.acme.com”.