If you installed it like that you shouldn't have to do anything but...who knows.
run lsof -i on your terminal window and see if you see something like this sshd 642 root 3u IPv4 1287 TCP *:ssh (LISTEN)
are you trying to connect to it from somewhere else outside your network or are u at home and trying to connect using a different machine?
The reason I ask this is I work for a company that has port 22 outgoing blocked, and i get the same error you get. I do however can access my machine from other networks including my own.
To make sure your router is accepting port 22 incoming u have to edit your router config via a web interface, should be in router manual, this is different for each router.
also you might have to check on your terminal if port 22 is disabled...
by doing iptables -L (this depends on whether you are running iptables or not)