Good Day Everyone,
Don't know whether this is the correct forum to be in, but I am going to ask a couple of questions anyways. Please be patient with me, i don't claim to be an expert at this stuff but I think I know just enough to be dangerous/get myself in trouble.
Went to DNSstuff .com which allows you to run some, what I think are, informational reports on a domain, etc. Overall my domain passed the tests the DNS Report ran but two tests did not pass. In the "NS" section it told me my DNS server was open and gave me the following info:
ERROR: One or more of your nameservers reports that it is an open DNS server. This usually means that anyone in the world can query it for domains it is not authoritative for (it is possible that the DNS server advertises that it does recursive lookups when it does not, but that shouldn't happen). This can cause an excessive load on your DNS server. Also, it is strongly discouraged to have a DNS server be both authoritative for your domain and be recursive (even if it is not open), due to the potential for cache poisoning (with no recursion, there is no cache, and it is impossible to poison it). Also, the bad guys could use your DNS server as part of an attack, by forging their IP address. Problem record(s) are:
Server 126.96.36.199 reports that it will do recursive lookups. [test] Server 188.8.131.52 reports that it will do recursive lookups. [test] See this page for info on closing open DNS servers.
My question - Should it be open or should it be closed?
Second thing was in the mail section that warned me about the SPF record:
Your domain does not have an SPF record. This means that spammers can easily send out E-mail that looks like it came from your domain, which can make your domain look bad (if the recipient thinks you really sent it), and can cost you money (when people complain to you, rather than the spammer). You may want to add an SPF record ASAP, as 01 Oct 2004 was the target date for domains to have SPF records in place (Hotmail, for example, started checking SPF records on 01 Oct 2004).
My question - Should there be one?
Please don't take these questions as an attack on TCH, I ask out of curiousity because of all the crap that goes on with the internet and spam