Netgear validating identity certificate
A DNS check enables you to use certificates with DNS or subject names.
If a certificate is reissued with the same DNS or subject name, then the identity check is still valid.
When you use NT Lan Man (NTLM) for authentication, the service identity is not checked because, under NTLM, the client is unable to authenticate the server.
NTLM is used when computers are part of a Windows workgroup, or when running an older version of Windows that does not support Kerberos authentication.
I went to netgear and it gave me instructions on what to do when this happens.