Based on what I read it sounds like you just need a USB cable and connect the printer to your computer and configure from there.
http://www.solveyourtech.com/how-to-...ther-hl2270dw/

To connect to your router over wireless make sure you are connected to the wireless network and open your browser and go to 192.168.1.1
Really it's better to be wired in, but it's possible to do a few things wirelessly. If you change the SSID and such you'll have to reconnect on the new SSID to continue.
Default user names:

Linksys BEFW11S4, WRT54G: admin
Linksys EtherFast Cable/DSL Ethernet routers: Administrator
Linksys Comcast routers: comcast
All other Linksys routers: [none]

Default passwords:

Linksys BEFW11S4: [none]
Linksys Comcast routers: 1234
All other Linksys routers: admin