Actual windows11 version seems to have a bug IPV6 RA failing

Question

Hi

Actually the Windows11 24H2 version seems to have problem to get an IPv6 address via RA(Router Advertisement) on Ethernet NIC, but able to get an IPv6 address via RA on WiFi Interface. My Cell phone (Android) can also get IPv6 address from the same router via RA without issue.

I didn't see this issue before, it seems one of the Windows 11 update causes this issue. How can I fix this issue?

Best Regards

Answer 1

Hello,

Thank you for posting in Q&A forum.

The inbound IPv6 Router Advertisement packets are allowed by default on a Windows machine by enabling the corresponding inbound rules from the IPv6 Core Networking group. Since the GPO disables any locally applied rules for the Public profile, these rules are not enabled and thus WFP expectedly drops the incoming packets.

There are 2 possible options to solve this issue,:

a. Allow merging of the local firewall rules in the GPO on the Public profile and make sure that the "Core Networking - Router Advertisement (ICMPv6-In)" is enabled on the target firewall profile.

b. Keep the merging of the local firewall rules in the GPO on the Public profile blocked, but configure the necessary inbound rule/s in the GPO targeting the device

I hope the information above is helpful.

Best regards

Zunhui

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