一、Windows禁用IPv6
To disable IPv6 on IBM Softlayer:
Open the registry editor. Press Windows key + R. In the Run dialog box, type regedit and click OK.
In the Registry editor, navigate to HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Services > TCPIP6 > Parameters.
Create a new DWORD.
Right-click on Parameters, select New, then DWORD (32-bit).
Set the name to DisabledComponents and press Enter.
Right-click on the new entry and select Modify. Set the Hex value to FFFFFFFF and click OK.
Reboot the client.
原文：
https://www.ibm.com/docs/en/cfm/2.0.0.3?topic=client-disabling-ipv6
二、设置ipv4优于ipv6：
Method 1: Registry Entry
You will need to reboot for the change to take effect.
Login to your computer as an administrator
Run the registry editor (regedt32.exe)
Add a registry key per the screenshot below then reboot for the change to take effect. To undo this change, simply delete the registry entry, then reboot again.
Location: HKLM\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
Key: DisabledComponents
Type: REG_DWORD
Value: 0x20
Method 2: Modify IPv6 Prefix Policies
1）查看当前设置
netsh interface ipv6 show prefixpolicies
优先顺序 标签 前缀
---------- ----- --------------------------------
50 0 ::1/128
40 1 ::/0
35 4 ::ffff:0:0/96 （代表IPv4，优先级35，标签值 4）
30 2 2002::/16
5 5 2001::/32
3 13 fc00::/7
1 11 fec0::/10
1 12 3ffe::/16
1 3 ::/96
其中 ::ffff:0:0/96 代表 ipv4，最左边数值代表优先级，越大越高级，第2列是标签值 4
2）修改当前设置，把35改成51，提升到最高
netsh interface ipv6 set prefixpolicy ::ffff:0:0/96 51 4
3）再次查看当前设置
netsh interface ipv6 show prefixpolicies
优先顺序 标签 前缀
---------- ----- --------------------------------
51 4 ::ffff:0:0/96
50 0 ::1/128
40 1 ::/0
30 2 2002::/16
5 5 2001::/32
3 13 fc00::/7
1 11 fec0::/10
1 12 3ffe::/16
1 3 ::/96
4）测试
ping localhost
如果是 127.0.0.1 就是ipv4优先，否则是::1，表示ipv6优先
参考：
https://kb.firedaemon.com/support/solutions/articles/4000160803-prioritising-ipv4-over-ipv6-on-windows-10-and-11
https://www.vwnet.jp/windows/w7/IPv4/IPv4PriorityUP.html
参考：
安卓系统禁用IPv6：
http://trustcomputing.com.cn/bbs/viewthread.php?tid=1885
Linux禁用IPv6或设置IPv4优先：
http://www.trustcomputing.com.cn/bbs/viewthread.php?tid=1897
Windows停用、启用网卡bat批处理：
http://www.trustcomputing.com.cn/bbs/viewthread.php?tid=1927
Proxifier的IPv6代理相关
https://blog.rhilip.info/archives/670/
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本帖最后由 linda 于 2023-12-12 11:33 编辑 ]
