https://www.officelivesupport.com/im-problem-teredo-tunneling-adapter-code-10/ The Teredo generally deals with the IPv6 and IPv4 mechanisms. The Teredo also creates a tunnel that allows IPv6 to generate the same advantages as IPv4. Due to this, the connectivity of the internet increases. But there are times when a user might face an error code like “Teredo Tunneling Adapter Code 10,” which creates significant problems.