In addition to standard tickets there are a few different types of special tickets that users can request for various purposes. Forwardable Tickets Forwardable tickets are tickets that allow the user to request a new ticket with a different IP address inside the ticket than the original ticket has in it. This allows users to use their current credentials to get credentials that are valid elsewhere. The primary use of forwardable tickets is that it allows a user to get a TGT, connect to another machine without a password and then reconnect to a third machine without having to get a TGT on the second machine. Doing so does not require a new authentication exchange but must be done before the ticket expires.
Renewable tickets do have a maximum renewable lifetime.
Postdatable tickets Postdatable tickets are tickets that are not currently valid but will be valid in the future. Generally postdated tickets are used for batch jobs that will be run in the future. They work like forwardable tickets except that they only allow you to transfer particular tickets over to the second machine.