Workaroud for Microsoft Update Breaking SonicWALL L2TP VPN?
Microsoft's January 2022 update breaks L2TP VPN for some, including SonicWALL.
Microsoft suggests the workaround of disabling the "Vendor ID" at the server end, and notes that this is option is not available for all. Is it available for SonicWALL L2TP VPN? I'm guessing not, or at least not in all cases, since the Vendor ID is referenced as used when NAT Traversal is enabled: