The Three Lions need to secure all three points from fixtures against Montenegro and Poland at Wembley to ensure their place in the tournament.
"I'm confident, we're confident, but you always have to be sure you're not over-confident," Goal.com quotes Rooney as saying. "These are going to be two tough games for us, but we're good enough to do it.
"They are going to be two tough games, though, because Montenegro and Poland are good sides and their best qualities are on the counter-attack.
"We will have to try and break them down and make sure we don't get caught out at the back. I think we'll do it, but nobody should think it's going to be easy."
England currently lead Group H by one point.