Hello,
I have DNS-320L, router Comtrend WAP 5813n.
So
(external IP) at outside
a) connect with LAN (everything OK)
b) connect wireless (everything OK)
(internal IP) at home
a) connect with LAN (everything OK)
b) CAN'T connect wireless.
wireless can login to dns-320L, but can't access FTP wireless. The same with laptop and tablet.