Try this steps for linux
Open your root or command promt and type
# dhclient -r eth0
# dhclient eth0
sudo /etc/init.d/nscd restart
And try to login again in blockchain.
I hope it helps...
will bookmark this whenever it happen again. thanks.
anyway, I already had loggedin to my account yesterday after hours and hours of waiting because they unbann them after 4 hours.
I don't have much to my blockchain wallet but still I wanna access this from time to time and just store few coins maybe less than $50.