It will need to be whatever port Server is configured to listen on (80 by default)
Thanks for the response.
I have the server configured as HTTPS, and we have opened port 443, however I am still getting a timeout when trying to access it.
Looks like 8000-8059, too. From http://onlinehelp.tableau.com/current/server/en-us/help.htm#ports.htm:
8000–8059 TCP API Server process (wgserver.exe). Base port 8000. Consecutive ports after 8000 are used, up to the number of processes. Tableau Server installs one API Server process on each node that has one or more Application Server processes. X wgserver.port
Note: For historical reasons, the names of port settings for the API Server process sometimes include