That page is terribly long to read. Its an easy fix.
#0 Make sure your router has the correct TIME.
#1 in linux run: openssl dhparam -out dhparams.pem 2048
#2 in the ASUS RT-* go to /Advanced_VPN_OpenVPN.asp and change it to "advanced" on the dropdown
#3 click Content modification of Keys &...
Thanks to the release of 1.0.2a openssl and #LOGJAM. Do the following
#0 Make sure your router has the correct TIME.
#1 in linux run: openssl dhparam -out dhparams.pem 2048
#2 in the ASUS RT-68U go to /Advanced_VPN_OpenVPN.asp and change it to "advanced" on the dropdown
#3 click Content...