 Theo Trung tam Internet Viet NamVNNICnhieu chu the ten mien cap hai thuong dang ky host tai cac server DNS mien phi o nuoc ngoai, voi nhieu rui ro doi voi domain rieng, dong thoi dich vu khong on dinh va kho kiem soat.
Ong Nguyen Duy Duong, chuyen vien cua VNNIC, phan tich rang cac thao tac quan tri ten mien tren may chu nuoc ngoai thuong chi thong qua web, dung user name, password va e-mail hoan toan khong co giay to gi rang buoc nen ten mien co the bi tan cong bang cach chiem doat tai khoan thong qua e-mail duoc nguoi dung dang ky ten mien. Cach thuc hien la gui Trojan, cai phan mem theo doi ban phim keylogger, dung hom mail gia (fake log-in mail)... de trom mat khau, dac biet la password cua e-mail dung dang ky ten mien. Mot phuong thuc khac la mao danh e-mail roi gui toi nha cung cap ten mien de yeu cau thay mat khau moi, hay chuyen ten mien qua noi khac. Ngoai ra, cac may chu hosting mien phi nuoc ngoai khong co nguoi dung ra chiu trach nhiem nen thuong tiem an rat nhieu lo hong. Hacker co the tan cong truc tiep vao dich vu cua nha cung cap hoac khai thac so ho cua nguoi quan tri de sau do chuyen ten mien qua cho khac. "Mot nguyen nhan khac la cac domain gap rac roi deu la nhung ten mien dang ky nhung khong duoc su dung de dinh danh cho dia chi IP cua web server hay mail server", chuyen gia cua VNNIC cho biet. "No giong nhu mot ngoi nha khong co nguoi o, khong ai quan tam cham soc nen co nguoi la dot nhap su dung ma chu nhan o dau do van khong hay biet". Theo VNNIC, ten mien .vn ngay cang phat trien va dang tang nhanh voi so luong lon nhung con nhieu truong hop chu the su dung chua quan tam den bao mat va quan ly khai thac su dung, dan den viec cac ten mien nay bi tam ngung, bi lai sang mot trang web co noi dung khac ma chinh ho khong he hay biet. Minh chung cu the la vua qua, cac website nhu game247.com.vn, gamecup.com.vn, vietsingle.com.vn... da dang tai noi dung khong lanh manh va deu bi xu phat. Tuy nhien, nhung "kho chu" noi tren deu khong the kiem soat duoc noi dung o website cua minh va khang dinh ban than ho khong dang tai cac thong tin do. Ho chi biet tinh hinh khi duoc VNNIC thong bao. VNNIC cho rang cac chu the can tranh tinh trang dang ky ten mien de "lam canh", ma thay vao do nen xay dung va dua domain vao hoat dong ngay tren mang cho website hay mail server. "Trong truong hop dang ky nhieu ten mien, hay link tat ca ve website dang hoat dong tren mang va thuong xuyen kiem tra trang thai hoat dong cua chung", ong Nguyen Duy Duong khuyen cao. "Chung toi muon canh tinh moi nguoi rang nguy co khong kiem soat duoc ten mien la co that va no dang hien huu doi voi cac chu the con chua quan tam den van de khai thac quan ly tai nguyen ten mien .vn" Theo VNNIC Article source http://w4rum.com/306.t
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