How do I connect my iMac directly to BT Fibre Modem

[#1]

Hi
As a temporary solution to my lack of a fibre router I would like to connect my iMac via ethernet to the BT modem (Plusnet chap Simon said it would work)
I tried quickly before I had to leave for work but couldn't sus it out.
My iMac was asking about DCHP or PPPoE and other info
any help would be great
thank you

[#2]

Set it for PPPoE with your PlusNet username and password. http://www.plus.net/support/broadband/hardware/broadband-connection-settings.shtml

[#3]

Taken from a comment on this library article http://community.plus.net/library/broadband/fibre-help-how-to-set-up-a-pppoe-dialler-in-vistawindows...
http://support.apple.com/kb/HT5303

[#4]

Thanks very much
I think I put in plusnet.dsl  instead of plusdsl.net
it should work, then I can share my internet wirelessly from the iMac
brilliant!

[#5]

Just wanted to say thanks for the help.
I didn't have a fibre router so I followed the set up given in the previous posts and connected my iMac directly to the BT Modem and I was back online. I then turned on wireless internet sharing on the iMac and I could get online with the iPad and Wii U.
It was a really big help last night so thanks again.
(got the correct router from Plusnet now so it all fine now)