vagrant up you'll see output like the following:
qualitybox: Forwarding ports...
qualitybox: 80 (guest) => 8888 (host) (adapter 1)
qualitybox: 3306 (guest) => 3333 (host) (adapter 1)
qualitybox: 22 (guest) => 2222 (host) (adapter 1)
So, if you open the web browser on your host to http://localhost:8888/ you'll see the website of the guest.
For SSH, you can just
vagrant ssh from the source directory