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Microsoft DirectAccess Best Practices and Troubleshooting by Jordan Krause

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What happened to Teredo?

Now that a lot of folks are moving to Server 2012 DirectAccess, I find environments all the time where all of the client computers are using IP-HTTPS for their transition tunneling technology. If Teredo is the most commonly used protocol out there in the wild, why does this happen? It is usually because a "shortcut" method was taken to implementing DirectAccess in the first place. If you have installed your DirectAccess server with only a single public IP address, or no public IP addresses at all and stuck it behind a NAT, then there is your answer. In either of these deployment scenarios, your only transition technology available to use is IP-HTTPS. Also, if you have checked the Force Tunnel checkbox during the wizards ...

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