How do I configure a service to listen on two ports?

[admin]

Although in the future we plan to support this through the software directly, this can still be achieved now. Most routers and firewalls allow port forwarding to configure the mapping of the internal and external ports separately, so the solution is to simply create a duplicate entry for the appropriate service. You should create an entry with the same internal and external port and another which maps a different external port but again to the same internal port. From the outside this will create the illusion that the service is available on 2 different ports.