Uri Even-Chen wrote:
I'm running a DNS server using BIND, and I downloaded the list of the
root servers from [http://www.internic.net/zones/named.root]. I found
out that there is one root server, F.ROOT-SERVERS.NET, which is
located in Tel-Aviv [http://www.root-servers.org/]. Actually, there
are 40 different servers called F.ROOT-SERVERS.NET, all using the same
IP address, and one of them is in Tel-Aviv. When my server contacts
F.ROOT-SERVERS.NET, it is directed to the one in Tel-Aviv. It takes 5
msec to return a query from this server (my server is located in
Haifa), while the other root servers take 81 msec or 182 msec or even
497 msec. I want to know how do I configure BIND to try
F.ROOT-SERVERS.NET first, or is that done automatically?
BIND will do this automatically. It will use the root server
showing the lowest RTT. There are some caveats here, but most
of your root server queries will go to F, which indeed has an
instance in Israel (provided by ISOC-IL).
By the way, maybe using my ISP (Netvision)'s DNS servers is better? I
don't know. I have some domain names which are configured locally,
but maybe I should redirect root server queries to Netvision's
servers? Would it be faster? And how do I do that?
No.
When I have a domain, is it OK if all the domain name servers are
located in Israel? Or would it be better if I would also have name
servers in other countries?
It would depend on where your users are. The issues are (a) resilience
and (b) performance (RTT). At any rate, you want a few (rather than
one) name servers, well separated (i.e. on different network segments,
preferably different transit providers etc.).
Where are the .com and .net servers located? (A.GTLD-SERVERS.NET
etc). Are they all located in the United States? Or are some of them
located elsewhere?
Worldwide (although many are in the US).
And where are the .il servers located?
Israel, USA, Europe.
Doron
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