Me and my pal have experienced an internet site (http://www.ferfereh.ir - sorry not british) for any year. We have used a Linux Apache host with wordpress installed. Now all of a sudden our posts (which in fact had a permalink structure = /%category%/%postname%.html) have broke and states:
404 Not found
Maybe our host provider has installed NginX. I'm not sure what Nginx exactly is however i read somewhere it has some conflicts using the .htaccess designs making our permalinks, is the fact that right.
What must i do?