AICCU on Windows does this, that is disabling teredo, next to disabling 6to4 and isatap. Typically though teredo/6to4/isatap should not be used as their routing metrics and getaddrinfo() preferences are really low, as such, you might want to check why it was chosen at all in the first place, especially over a link that has less priority, noting also that the getaddrinfo() rules will make the IPv6 address space very close on the link itself thus that really should be preferred.