[Samba] 4.13.2 guest access denied with "Bad SMB2 signature"

[Jeremy Allison]

On Thu, Dec 10, 2020 at 06:35:34PM +0000, Rowland penny via samba wrote:

> Stop me if I am wrong but doesn't 'windows guest' != 'Samba guest' 
>and the Samba guest works on the principal of 'I do not know who you 
>are and don't care about your password' so the unknown user gets 
>mapped to the Samba guest user (usually 'nobody') and is then allowed 
>access to any 'guest' shares. If this worked before, then it may be a 
>bug, but it all depends on just how the OP is connecting to the share, 
>who as etc.

It's the "don't care about your password" that's the problematic
part. The session key for signing is derived from the password.