Hi, you may feel this “Immature”, I tend to forget this simple thing always!

Disable ipv6 on windows 2008/2012 servers

Open Registry using run “Regedit”

Navigate through HKEY_LOCAL_MACHINE> SYSTEM>CurrentControlSet> services> TCPIP6 > Parameters.

Right click on Parameters and select New and then DWORD (32-bit) Value.

Name the new value DisabledComponents and hit Enter.

Now right click on the new DisabledComponents value you just created and select Modify.

Set the value of DisabledComponents to FFFFFFFF and click OK.