cisco ios version 16.8 vpn l2tp troubleshooting

Job ID: 34218318

Budget: $10 – $30 USD

cisco ios version 16.8 vpn l2tp troubleshooting

i try to create vpn l2tp on my router cisco ios version 16.8
my problem is
i can create vpn is created good and it is login on my windows system client
but i can not ping any ip from my windows 10
ping >> timeout

no i use this command on my router
show vpdn tunnel l2tp packets

Pkts-In Constantly increasing after each ping
and Pkts-Out It never increases. It is fixed to the number 10
This means that ping packets reach the router
But the router can't process it

important note
this is my vpn pool
192.168.3.5 192.168.3.15
now on i connect vpn
i have get this ip
192.168.3.5
this ip from router i can not ping it