如何在OS X上从一个本地端口转发到另一个本地端口?

I have a MySQL instance running locally on port 3306, but for some legacy apps I also want to make it available on port 3305 (don't ask). Is there an easy way to do this on OS X, so that if I try to connect on either 3305 or 3306 they will both go to the MySQL server on 3306?I have a MySQL instance running locally on port