Hello Zaheer and welcome to Zima forum.
Concerning your question:
The ping delay is acceptable.
Did you change any firewall rules recently?
This could be the cause.
On another note here is the troubleshooting guide that could also help: Troubleshooting Router Connectivity (Ping, Firewall)
Feel free to reach out for any further questions
I changed some mangle role in firwall.
plz check my router.