[CentOS] Re: OT: anything in CentOS 5.2 that uses opendns.com when browsing web?
Scott Silva
ssilva at sgvwater.com
Thu Jul 10 21:53:37 UTC 2008
on 7-10-2008 2:32 PM Lanny Marcus spake the following:
> On 7/10/08, Scott Silva <ssilva at sgvwater.com> wrote:
> <snip>
>> Try dig +trace emcali.net
>> It should show all servers "your" query goes through.
>
> Scott: Please note that I added ".co" (for Colombia) emcali.net.co
> Is this showing which DNS Servers my DNS requests use, or, which DNS
> Servers serve their web site? Also note that when I tried "dig
> +trace" or "dig trace" I got very abbreviated answers. Probably I
> don't have the syntax correct. Question: Is there another command I
> can use, to another web site (irs.gov or something) that shows which
> DNS Servers I am using, to get to that web site? My wife is
> complaining, again, as I write this, so getting our own Caching DNS
> Server, ASAP, has become a priority. When Colombian women are mad...
> :-) TIA, Lanny
>
When you set up your connection to your provider, do you have a static address
or dynamic? If static, you had to set your next step resolver in the config.
If you are dynamic, you get what your provider sends with the dhcp request.
Since you said you have an ipcop box for your router you should be able to ssh
into it and run setup and change your nameserver setting to 127.0.0.1 and your
ipcop should be a caching nameserver. If you have another address there it
will query to that server.
I just tried it from one of my ipcop boxes and got a query all the way to the
root servers;
dig +trace gmail.com
; <<>> DiG 9.3.4-P1 <<>> +trace gmail.com
;; global options: printcmd
. 353305 IN NS E.ROOT-SERVERS.NET.
. 353305 IN NS F.ROOT-SERVERS.NET.
. 353305 IN NS G.ROOT-SERVERS.NET.
. 353305 IN NS H.ROOT-SERVERS.NET.
. 353305 IN NS I.ROOT-SERVERS.NET.
. 353305 IN NS J.ROOT-SERVERS.NET.
. 353305 IN NS K.ROOT-SERVERS.NET.
. 353305 IN NS L.ROOT-SERVERS.NET.
. 353305 IN NS M.ROOT-SERVERS.NET.
. 353305 IN NS A.ROOT-SERVERS.NET.
. 353305 IN NS B.ROOT-SERVERS.NET.
. 353305 IN NS C.ROOT-SERVERS.NET.
. 353305 IN NS D.ROOT-SERVERS.NET.
;; Received 376 bytes from 127.0.0.1#53(127.0.0.1) in 0 ms
com. 172800 IN NS G.GTLD-SERVERS.NET.
com. 172800 IN NS D.GTLD-SERVERS.NET.
com. 172800 IN NS H.GTLD-SERVERS.NET.
com. 172800 IN NS J.GTLD-SERVERS.NET.
com. 172800 IN NS F.GTLD-SERVERS.NET.
com. 172800 IN NS B.GTLD-SERVERS.NET.
com. 172800 IN NS A.GTLD-SERVERS.NET.
com. 172800 IN NS E.GTLD-SERVERS.NET.
com. 172800 IN NS C.GTLD-SERVERS.NET.
com. 172800 IN NS K.GTLD-SERVERS.NET.
com. 172800 IN NS I.GTLD-SERVERS.NET.
com. 172800 IN NS M.GTLD-SERVERS.NET.
com. 172800 IN NS L.GTLD-SERVERS.NET.
;; Received 499 bytes from 192.203.230.10#53(E.ROOT-SERVERS.NET) in 23 ms
gmail.com. 172800 IN NS ns1.google.com.
gmail.com. 172800 IN NS ns2.google.com.
gmail.com. 172800 IN NS ns3.google.com.
gmail.com. 172800 IN NS ns4.google.com.
;; Received 170 bytes from 192.42.93.30#53(G.GTLD-SERVERS.NET) in 22 ms
gmail.com. 60 IN A 209.85.171.83
gmail.com. 60 IN A 64.233.171.83
gmail.com. 60 IN A 64.233.161.83
gmail.com. 345600 IN NS ns1.google.com.
gmail.com. 345600 IN NS ns2.google.com.
gmail.com. 345600 IN NS ns3.google.com.
gmail.com. 345600 IN NS ns4.google.com.
;; Received 218 bytes from 216.239.32.10#53(ns1.google.com) in 44 ms
--
MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!
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