<div dir="ltr">You can investigate cookies, if you think that is the issue, by setting options found in the manual.  There are a few options:<div><br></div><div><a href="https://bind9.readthedocs.io/en/v9_18_9/reference.html#namedconf-statement-require-server-cookie">https://bind9.readthedocs.io/en/v9_18_9/reference.html#namedconf-statement-require-server-cookie</a></div><div><br></div></div>