The name of this flag is terrible but if you read the 2.8 spec.&nbsp;&nbsp;<br /><a href="https://uefi.org/sites/default/files/resources/UEFI_Spec_2_8_A_Feb14.pdf">https://uefi.org/sites/default/files/resources/UEFI_Spec_2_8_A_Feb14.pdf</a><br />page 1436.&nbsp;&nbsp;<br />Says:&nbsp;<br />EFI_TLS_VERIFY_FLAG_NONE means no additional flags set for hostname validation. Wildcards are supported and they match only in the left-most label.<br /><br />In the HttpDxe driver we made a change to support wildcards as wildcards are pretty commonly used in web services.&nbsp;<br /><a href="https://github.com/microsoft/mu_basecore/commit/931ff1a45ce13a6a8c3e296f89c6de21f23a17ed#diff-45ead71899abef9932d2697dbd1d8867">https://github.com/microsoft/mu_basecore/commit/931ff1a45ce13a6a8c3e296f89c6de21f23a17ed#diff-45ead71899abef9932d2697dbd1d8867</a><br /><br />There is a lot of noise on this thread but its the best i can find.&nbsp;<br /><a href="https://bugzilla.tianocore.org/show_bug.cgi?id=960">https://bugzilla.tianocore.org/show_bug.cgi?id=960</a><br /><br />We might need to open a new bugzilla as i think 960 is resolved but is too strict for practical usage.&nbsp;<br /><br />Thanks<br />Sean<br />