Cannot access internet via Wi-Fi on YU Yureka running Lollipop
Tweaking the DNS might solve the issue. Go to Settings>>Wi-Fi and turn on the Wi-Fi. If the network is known, 'forget' it and then connect it back. Once the password window pops up, click on 'Advanced options' and select 'Static' from the IP settings drop-down menu. Then scroll down and enter the IP address of the DNS server you would like to use in DNS1 and DNS2 box. Now enter your Wi-Fi password and connect it.