Changes

First of all, you should be aware that you will be asked for a ticket at four different places: the entrance of the port (by policeman), the entrance of the customs office (where you'll get the Azerbaijan and Kazakhstan passport stamps), the inside of the ferry, and the Kazakhstan customs after the trip. Bribing could probably get you through the two first two controls, but it is much easier to just befriend the policemans of the port in order to do so. After that, you will finally arrive the ferry, which ought to be the hardest part of your adventure. If you declare that you have no ticket outright, you will be inmediately kicked off from the boatship, so your best option is to stall with some excuse in order to attempt to speak directly with the captain, who's the only one who might accept to take you aboard with no ticket. Once you've managed to stay on board after the departure, the rest of the trip should be easy, and because it is unlikely that you encounter any serious problems at the Kazakhstan border.Enjoy your ride!