hancong6780

please all cctv fourm member help me! now i got problem is dvr connect the dvr,use static mode. dvr model :china brand h.264 4ch dvr, modem: main/DLINK 2640b adsl modem, sub/DLINK DIR-615 wireless router. now dvr is connect with DIR-615,so,now i need setting dvr port forwading and vitral server in DLINK-2640B, of DIR-615??? what i need setting in router?? first modem second router and the dvr