HRESULT 0x80320042 (FWP_E_INVALID_DNS_NAME): meaning and diagnosis

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Description:

A DNS name supplied to a WFP or IPsec policy is invalid.

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FWP_E_CONNECTIONS_DISABLED	FWP_E_STILL_ON

FWP_E_INVALID_DNS_NAME

FWP_E_INVALID_DNS_NAME means the policy supplied an invalid DNS name where WFP expected a DNS identity.

Use a syntactically valid DNS name without unsupported characters or malformed labels.
Make sure the policy field expects a DNS identity rather than an IP address, URI, or display name.
Check the final normalized name sent to the API, especially when configuration is assembled from user input or certificates.