setup opendns with home network

Hi,

I have followed the instructions for setting up opendns on my UTM, with the exception of request routing.  My setup is at home, so what should I be putting in my domain/reverse dns?  Can I just leave those blank or am I going to have performance issues with this setup?

https://www.sophos.com/en-us/support/knowledgebase/120283.aspx

I am running the latest 9.x on a PC.  

Thanks