در مورد نتایج سایت intodns.com چند تا سئوال داشتم:

1- بخش Recursive Queries قرمز رنگه و این پیام رو میده:
"
I could use the nameservers listed below to performe recursive queries. It may be that I am wrong but the chances of that are low. You should not have nameservers that allow recursive queries as this will allow almost anyone to use your nameservers and can cause problems. Problem record(s) are

2- بخش "Different subnets" زرد رنگه و این پیغا رو میده:
WARNING: Not all of your nameservers are in different subnets

3- بخش "Different autonomous systems" زرد رنگه و این پیغام رو میده:
WARNING: Single point of failure

4- بخش "SOA EXPIRE" زرد رنگه و این پیغام رو میده:
"Your SOA EXPIRE number is: 3600000. That is NOT OK"