If they do DPI on port 53 traffic to only allow DNS, then it's necessary. The neat thing about iodine is that it even works when you don't even have access to

If they do DPI on port 53 traffic to only allow DNS, then it's necessary. The neat thing about iodine is that it even works when you don't even have access to your home/whatever destination IP address due to the firewall redirecting packets to their server. It uses their resolver as a proxy to access a nameserver that you control, allowing you to exfiltrate data and get an uncensored connection.