You have been assigned to report to your network administrators on the use of Teredo

Case Project 4-1: Tunneling IPv6

You have been assigned to report to your network administrators on the use of Teredo. Prepare a two-page memo that outlines why Teredo was developed, how it is implemented in Windows operating systems, for which types of networks it is appropriate, and how long it should be implemented.

Expert Solution

Development Of Teredo:

There are various tunneling methods that have been implemented and developed before Teredo
But they are not supported for protocols like IPv6 devices that are behind network translation devices.
Teredo was developed to give full IPv6 connectivity for IPv6 capable-that are on the IPv4 Internet but have no connection with an IPv6 network. Teredo can perform its function from NAT(network address translation) devices.

Implementation in Windows OS:

Microsoft implement certain unspecified non-standard extensions to improve support for symmetric NATs
Teredo was implemented by Microsoft for connectivity with the IPv6 over an IPv4.
It acts as an interpreter that allows to change IPv4 to IPv6 or IPv6 to IPv4.
Since there are many users we are not fully depended on IPv4 addresses. They can easily be fully occupied. So when there is a shortage of IPv4 addresses, We can make use of Teredo for continuing our data transmission or recieving of data.(Communication is possible with the help of Teredo).

Appropriate for the following:

Since Teredo embeds the IPv6 inside UDP packets and then transmits them within IPv4 packets, UDP traffic must be allowed on the firewall to allow Teredo to work.
Teredo tunneling starts with Teredo clients communicating with a Yeredo server. In this initial phase, client location is determined, i.e. whether it is behind a symmetric NAT, cone or a restricted cone.
After the position of the client is determined, the Teredo IPv6 address embeds the address and port through which the client can receive IPv4/UDP packets encapsulating IPv6 packets.
Teredo works by tunneling IPv6 over an IPv4 UDP port for a part of the network which supports IPv4 but not IPv6.

How long it should be implemented:

Teredo Tunneling comes with various security issues that should be kept in mind before it is deployed in the network.
Teredo is not compatible with all NAT devices.
So it is not for a long term usage. It can only be used for a short period of time.

venereology answered 2 years ago

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