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[HieuDallas]

Coi chừng mấy cái máy đó ghost mà quên chạy cái GhostWalker đễ cho nó cái SID mới. Máy khác tên mà cùng SID.

[freetudo]

Lam du moi cach ma khong chay thi phai bat dau tim lai tu dau :
1/ Kiem diem ve phan hardware nhu da neu ra , xem co bi colision gi khong , lay cable RJ45 khac , thay cart mang , hay co 1 pc khac , muc dich la de minh loai bo phan hardware.OK
2/ Neu tren server co dung ISA thi phai thu la down ISA, thao firewall (win2003 no khong thich gi may firewall, thao ra de test chu khong phai thao alway luon) .
3/ xem lai GPO vi doi luc lam trong GPO no co the cho minh conection trong khoang thoi gian nao do , thao GPO ra khoi domain , mot thoi gian thoi vi muc dich cung la test, (neu trong server co dung GPO).
4/ Connecte vo server , account Administrator , vao c:\> lam 1 folder , roi share cho het quyen , write , modify v.v
5/ Tao 1 account test , cho quyen Administrator
6/ client XP phai join domain , sau do thu connect vao folder minh moi share.
a/Neu xp connecte duoc thi loi nam trong nhung GPO hay la ISA , firewall.


B/ Neu ma khong vao duoc folder minh share hoac dung hon la vao duoc server thi , luc nay day ban phai khan cap save tat ca cac data , nhung gi quan trong ra ngoai, "chuan bi install cai server khac".Nhung truoc khi do cung phai antivirus truoc , roi thu vao tro lai xem co ok khong !tim khong thay virus ma van khong vao duoc thi chi con cach la install lai OS Win2003 .

Thong thuong la GPO va ISA no hay lam cho minh bi nhung van de nay, khi lam GPO thi phai can than la minh ap dung cho ca domain hay la chi ap dung cho mot OU thoi , cai nay phai biet phan biet , vi admin hay lan lon hai cai nay.

Them ve phan technic: Neu ban da loai bo tat ca phan software la install OS server moi , OS xp moi ,khong co lam GPO , ISA hay firewall gi het ma van bi thi luc nay minh phai kiem soat lai phan noi mang cable, vi sao ? theo tui nghi minh da lam va test tat ca ma van bi thi phai xem xet xa hon co nghia la xem den Router hoac switch , neu router va switch , configuration ok chac chan la ok thi loi 80 den 90% la cable mang o noi may cai RJ jack (noi trong tuong ra ma cable RJ45 cua PC no gan vao do) , loi la soi cable Cat5 hay Cat5e hay cat6 gi do khong can biet , nhung khi minh gan thi may anh chang tho dien hay Administrator CCNA gi do da lam mot hoac nhieu RJ Jack ma may cai (braided copper shielding) khong gan ky luong co nghia la may cai nay khong co tiep xuc 100% voi phan metal cua RJ Jack , va cho noi de may cai switch , router va hub gi do thong thuong goi la rack , no phai co soi day ground , soi day nay la no chuyen tu may con oc de siet SW hay router vao rack va rack no phai co day dat (ground) day nay no phai connect voi ground cua dien 220v dang hoang , Ve phan ground minh kiem soat rack , gi ok het di.
Tai sao mang luc co luc khong ? bien chung la nhu vay , may cai RJ rack khong co gan ky luong co nghia la khong co su tiep xuc giua phan metal cua RJ Rack va Braided copper shielding , khi day RJ 45 gan vao Switch luc do minh co volt la khoang 5V DC , thieu ground no se tao ra mot cai return (di nguoc tro lai) tu cable RJ45 - RJ Jack va RACK (noi minh de may cai SW va Router) , khi no la mot cai return nhu vay co nghia la signal 5v minh khong co vao Sw duoc dang hoang (dien cable RJ45 la 5v khi dong dien chay tu - qua + trong soi cable rj45 , no phai di 1 vong , may metal aluminium la de gan vao ground neu co nhieu magnétique xem thi vu cable coaix de hieu hon), luc co signal luc khong co Signal thi lam sao minh co connection tu pc toi SW duoc ?, muon tim bien chung nay co that hay khong thi chi co cach la dung may do tung chau RJ Jack de xac dinh la 100M va bao nhieu DB , signal co nhan du hay khong tu RJ Jack va SW. Day la phan technic can phai biet.
Minh hy vong la ban tim ra duoc ly do.

PS:metal la kim loai , cho RJ rack thong thuong la lop bao ve bang aluminium
Cable coaix luc minh gan net thi thong thuong o 2 dau no co CAP (tieng Anh), (giong nhu nut , tieng Phap la Bouchon) bang kim loai, vi sao ? thi cung nhu giai thich ben tren , dien 5v trong soi cable , no chay hoai neu dau cable khong co CAP thi dien no di luon co nghia la message cua minh no khong co tro lai , CAP o 2 dau NET (cap co nhiem vu lam resistance--> hieu dai khai nhu can tro dien, dong dien se di qua kho khan), vi khi lam cable coaix nguoi ta co mieng luoi bang dong trong soi cable , mieng luoi nay se co contact (dung cham , gap go) voi chau cua dau cable coaix (bang kim loai), va o dau nay neu la cuoi cung cua net va dau cua net thi phai gan CAP (day nut),technology dung chinh xac nhu RJ45, rat la can may cai luoi nay , giong nhu may mieng giay aluminium o may day RJ45 , khong co thi NET khong bao gio chay dang hoang(vi cable bi mat signal), don gian thoi.Khi mot dong dien di qua 1 soi day cable RJ45 hay coaix gi do khong can biet,no se tao ra mot tu truong goi la magnétique (tieng Phap) , cai tu truong nay no se lam anh huong den dong dien 5v cua minh , cho nen bat buoc phai dem no vao ground ( la dem xuong dat) .Biet de do chu tui nghi ban khong co dung den may van de nay dau, mang net noi la de dang khi nao no chay ok , nhung khi no khong ok thi minh phai phan tich va tim ly do tai sao ? noi ve technic bat cu mot van de gi no LUON LUON co ly do, cai kho la phai tim cho ra.Soi day mang xem don so chu khi co problem thi no khong co don so dau! giong nhu wireless , user thinh thoang co phone o mobile thi ai nay trong bureau hay bi rot mang vi lan song mobile bay gio no lon hon lan song cua card mang wireless gap may lan , co phone la rot mang chuyen binh thuong.