Seems yahoo login server is banned in your place.restart your router/modem. Changing the IP address may help you to login. I am giving some login server link below. you may try copy the links on your browser and try login.
https://login.yahoo.com/config/login_verify2?
http://login.bjs.yahoo.com
http://login.cn.yahoo.com
http://login.kr.yahoo.com
https://login.yahoo.com/config/login?.src=fpctx&.intl=ca&.done=http%3A%2F%2Fca.yahoo.com%2FTry these let me know.
Thanks
×