Miredo is an Unix daemon program which mostly implements the "Teredo: Tunneling
IPv6 over UDP through NATs" Internet proposed standard (RFC 4380). It can
provide either client or relay functionality. A separate program, miredo-server
is also included in the package; it consists of a Teredo server.
Miredo can be used to provide IPv6 connectivity to users behind NAT devices,
such as broadband routers. Most of these device do not support IPv6, and do not
allow forwarding of proto-41 (including 6to4).