Create a file called dogecoin.conf and add the following line
now save the file and put on the folder were your Dogecoin Node is installed and restart your node.
You can also download a alredy made dogecoin.conf file clicking here
Windows Folder: C:\Users\[YOUR USERNAME]\AppData\Roaming\Dogecoin or ( %APPDATA%\Dogecoin )
MAC Folder: $HOME/Library/Application Support/Dogecoin
Linux Folder: $HOME/.dogecoin