Iodine dns tunneling not work

i test iodine dns tunneling on my server but i have problem i've run command both on my server and client side same as their github document , i can successfully connect to my server from client but i can not ping or ssh to my interval ip that i set as dns0 in my server from clinent side ( for example 10.0.0.1 or any ip that i set for my iodined server ) the connection has been successful but i can not ping or ssh

Any one can help me with this ?

I test many times and i check my firewall for open 53 port udp/tcp and my network card but i have problem , the connection between server and client are successful but i can not ping