Set Teredo State - Enable - choose "Client" (If after doing all steps it fails, try choose Enterprise Client instead.) After that, Win+R , services.msc, look for "IP Helper" and restart services. Now , Win+R, cmd, input " netsh interface teredo show state" and you should be seeing something like this:
net.ipv6.conf.lo.disable_ipv6 = 1. 4. Save and close the file. 5. Reboot the machine. To re-enable IPv6, remove the above lines from /etc/sysctl.conf and reboot the machine. The caveats. To disable unused IPv6 transition protocols on a per-host basis on Windows 7 client using netsh, open an elevated command prompt and execute the following commands: netsh interface 6to4 set state disabled netsh interface teredo set state disabled netsh interface isatap set state disabled Set Teredo State - Enable - choose "Client" (If after doing all steps it fails, try choose Enterprise Client instead.) After that, Win+R , services.msc, look for "IP Helper" and restart services. Now , Win+R, cmd, input " netsh interface teredo show state" and you should be seeing something like this: Xbox Support loading Teredo. 05/31/2018; 2 minutes to read; In this article Purpose. Teredo is an IPv6 transition technology that provides address assignment and host-to-host automatic tunneling for unicast IPv6 traffic when IPv6/IPv4 hosts are located behind one or multiple IPv4 network address translators (NATs). Beside, disable IPv6 on specific network connection also does not disable IPv6 on tunnel interfaces or the IPv6 loopback interface. It's also possible to disable IPv6 and/or Teredo via Windows system registry, which has the advantage to have the IPv6 policies applied to all network adapters.
Teredo Server: Teredo Server is used for initial configuration of a Teredo tunnel. It is a node which has IPv4 connectivity and can be used to provide IPv6 connectivity to Teredo clients. Teredo Relay: Teredo Relay is an IPv6 router which is used to forward all of the data on behalf of Teredo client it serves.
Even if you disable IPv6, you can't disable IPv6 on pfSense itself. These days, IPv6 is the main network protocol - and IPv4 is the "tolerated while time lasts" protocol. So, your DNS - the Resolver - will still resolve any URL to AAAA and A if they exist.
To determine the IPv4 addresses of Teredo servers, the client may send a DNS query to resolve the name teredo.ipv6.microsoft.com. To prevent Teredo related DNS query, or for those who doesn't use Teredo or IPv6, users can disable or control Teredo in Windows by using the following methods.
In order to disable IPv6 in Windows Server 2012 follow this Free PDF step by step process. The world is running out of Internet addresses. IPv6 is the answer to that problem, but in some cases and implementations it can cause problems of its own. There's no reason to disable IPv6 [Update by Yong Rhee[MSFT] as of 180227] Our Windows Product Group does not test anything with IPv6 disabled. Instead of completely disabling IPv6, since Windows Vista, 7, 8, 8.1, 10 and their corresponding Server OS'es prefer IPv6, instead, if you are really itching to disable IPv6, set the policy/registry, to Prefer IPv4 over IPv6. Issue was fixed after disabling IPV6 from the Tunnel adapter on destination server by using the below command: netsh int ipv6 isatap set state disabled netsh int ipv6 6to4 set state disabled. You can also disable Teredo/isatap(Tunnel) adapter using the below command: netsh interface teredo set state disable netsh interface isatap state disable Even if you disable IPv6, you can't disable IPv6 on pfSense itself. These days, IPv6 is the main network protocol - and IPv4 is the "tolerated while time lasts" protocol. So, your DNS - the Resolver - will still resolve any URL to AAAA and A if they exist.