yes even i feel that its prob betn MTNL and VSNL. but then how did 1 IP worked and 2 didnt for same subnet?i also have feeling that VSNL may be doing this on purpose!! to kill competition from MTNL. they randomly block random sites so that they are not caught.btw problem started again..yahoo mail (us.mg1.mail.yahoo.com) not workingtataindicom.in not workingalso different sites for different users stop working.so its like for 1 user yahoo is working and for other its not.so vsnl can say, look its working for 1 user, not our problem!!