I had access to my router and my internet was also working fine, but I was trying to do a port forward of 80 to my local machine and in the process I made a mistake. I went into Remote Management and for port 80 there were a few options like LAN, WAN, All. I accidently clicked "all" and then clicked "Disable".

The problem is that I am no more able to access my router using 192.168.1.1, although my internet works. If I do a ping 192.168.1.1 I am able to receive the response, but I am no longer able to browse the internet. How can I fix this issue?

I am using a zyxel p-660hn-t1a router given by my ISP.