Would you please take a look on this DNS report for on of my websites on VPS http://www.dnsreport.com/tools/dnsreport.ch?domain=zaidal.com is this error so serious and how to fix it : FAIL Open DNS servers
Yep, Check this domain and some others that you know are run as well. It's the same as your's. Again, I dunno what it means though.
it means that anyone could use your dns server to lookup any site on the net. You only want to be answering questions about your own domains, not others. If you look in the description of the problem there is a link to instructions on how to fix it.
It's not serious, but could be a problem if someone exploited it. DP I think has theirs open as well. You have to edit /etc/named.conf with some info to do it.