hi, i have a PROLINK H5001N WiFI Modem, i had port forwarded 5121, 6121, 6900 ports thru virtual server, but those ports are still blocked, so ive searched the net and found that the DMZ Host can help me setting up my rAthena server, but the problem is, DMZ Host opens all ports.. is it safe? is it possible to open the 6121, 5121, 6900 ports thru DMZ?