The Wallabies scored three tries - as many as Wales had conceded in five games in their Grand Slam campaign - in their 27-19 win in the first Test in Brisbane.
And defence coach Edwards wants to cut back on the points his team conceded when they take on the Wallabies in Melbourne.
"We are playing against a Tri Nations team and in the professional era we have yet to beat a Tri Nations team away from home," said Edwards.
"So, if you look at the history of it, it is obviously a huge challenge, but we are just looking at the here and now and the things we have to change and improve on from last week.
"We are going to get up to the pace of the game a bit more. Sam Warburton will have a little bit more confidence under his belt having played his first game in 11 weeks and it should be a little bit cooler in Melbourne than it was in Brisbane.
"It is difficult to keep a Tri Nations team to less than 20 points, but if we can keep them between 15-18 we will be in with a chance of winning the game."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.