How can I fix the Animal Crossing WW error 86420?

Question

According to Nintendo, I have to assign an IP address to my DS or open too many ports to my router. Isn't that dangerous? I was wondering if there's a safer way to solve the problem.

This is the page from Nintendo: http://www.nintendo.com/consumer/wfc/en_na/ds/results.jsp?error_code=86420&system=DS&locale=en_US

Answer 1

No sorry, just Follow what they have said to do as they no best, better than most people who will answer on here, Nintendo wouldn't sugest to do something that is dangerous