Zitat von mpachmann am 21. Mai 2024, 10:56 Uhr

There are two ways to do this:

1. Create a registry entry to prefer IPv4 over IPv6.
2. Directly modify the IPv6 prefix policies to prefer IPv4 over IPv6.

Method 1: Registry Entry

https://kb.firedaemon.com/support/solutions/articles/4000160803-prioritising-ipv4-over-ipv6-on-windows-10-and-11

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 DEC: 32

 

or block with Windows Firewall Rule
inbound & outbound block:

Core Networking - Router Solicitation (ICMPv6-in)
Core Networking - Router Advertisement (ICMPv6-in)
Core Networking - Router DHCP (ICMPv6-in)