[CentOS] Re: OT: anything in CentOS 5.2 that uses opendns.com when browsing web?

Scott Silva ssilva at sgvwater.com
Thu Jul 10 21:01:31 UTC 2008


on 7-10-2008 1:55 PM Lanny Marcus spake the following:
> On 7/10/08, Rob Townley <rob.townley-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
>> why not use the dig command to query your isp dns system to see if
>> they forward requests to opendns.  By the way, OpenDNS is a great way
>> to help prevent phishing attacks.
> 
> Rob: What other parameters or arguments I should add onto the dig
> command,  to see if they use opendns.com ? I don't see opendns.com in
> the below, but probably that is not the correct dig command.
> 
> [lanny at dell2400 ~]$ dig emcali.net
> 
> ; <<>> DiG 9.3.4-P1 <<>> emcali.net
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41909
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 3, ADDITIONAL: 0
> 
> ;; QUESTION SECTION:
> ;emcali.net.                    IN      A
> 
> ;; ANSWER SECTION:
> emcali.net.             3600    IN      A       66.45.254.245
> emcali.net.             3600    IN      A       66.45.254.244
> 
> ;; AUTHORITY SECTION:
> emcali.net.             172800  IN      NS      ns3.hostingchange.net.
> emcali.net.             172800  IN      NS      ns2.hostingchange.net.
> emcali.net.             172800  IN      NS      ns1.hostingchange.net.
> 
> ;; Query time: 1100 msec
> ;; SERVER: 192.168.10.1#53(192.168.10.1)
> ;; WHEN: Thu Jul 10 15:46:18 2008
> ;; MSG SIZE  rcvd: 128
> 
> [lanny at dell2400 ~]$
> 
>> Lastly, you should use this opp to create a opendns signon, this will
>> give you control over your dns request options.  You could block any
>> domain via dns quikly.
> 
> I will look at the opendns.com web site.  I just cannot imagine that
> the Firefox browser is ending up at opendns.com (intermittently) on
> it's own. It must be coming from the DNS we are using.  Thanks much!
> Lanny
Try dig +trace emcali.net
It should show all servers "your" query goes through.

-- 
MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

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