my mikrotik suspect have been hacked

hi all..can u help me..im suspect my mikrotik have been hacked by someone.i cannot open only my school website.the rest can access.i have contacted my isp they told they side is no problem.that y im suspect my mikrotik hav been hacked and filter my school website.Can u all help me how to remove from filter our website.Thanks

they message appear
Oops! Google Chrome could not connect to kysm.edu.my

Try reloading: kysm.­edu.­my

Run you proxy server?
Look into firewall layer 7 protocol

Post your export.