Make a multicast address available outside the LAN


Is it possible to make a private multicast address available outside the LAN so anyone can receive the stream? Perhaps NAT it to a public address? Has anyone ever tried to do this? I'm just curious.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

A router will not take a private multicast address onto its interface because it is "link local," meaning that it should never leave the LAN. Therefore, it won't NAT it. The only way to do it is to make the multicast address something that is routable.
typertecAuthor Commented:
Can a multicast address be any routable address? Have you done it before? I would think it is tough to do because the ISPs router will also have to support multicast.
No. A multicast address must be in the range

I just realized that I mixed up 2 things. Link-local and private are completely different. Link-local addresses are in the range and will never leave the LAN.

The range for private multicast addresses is These are like You CAN do NAT on multicast. But yes, all routers involved MUST support multicast.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Network Architecture

From novice to tech pro — start learning today.