RSS Help

Please help, I have never used RSS before. Could someone give me an example of how to setup a 4chan imageboard rss feed? The FAQ says the format should be http://subdomain.4chan.org/board/index.rss, but how would one determine the subdomain and board variables for say /b/? I tried boards and www for subdomain, and I tried random and b for board. I got 404 from all variations.

TIA

http://boards.4chan.org/r9k/index.rss <-- This is a working example for /r9k/. All boards are on the boards.4chan.org sub-domain. Just copy that and edit for the board you're trying to pick up a feed from accordingly.

>>1
It doesn't work on /b/

>>3
That's because /b/ doesn't have one.