@jahonix:
You seem to have an IP conflict.
Your Linksys router AND your pfSense both have the IP 192.168.1.1 - which doesn't work.
Using a switch seems to be the easiest to solve this. Don't connect the router at all.
Okay, seems to be a simple solution. What I figured, thank you.
I'm going to be needing wireless however. But i'll cross that bridge when I get there. I think it's just a matter of adding a new interface and plugging in the router, I'll research more.
Thank you :)