DNS problems - slow to resolve

[David Daugherty]

Ok, I wasn't getting the IPs in my resolv.conf because I had
dhclient.conf modified to supersede to the local DNS. Here's what I
did to determine the DNS that my ISP was assigning me.

I changed the dhclient.conf back to empty and restarted the network.
This then put the IPs of the two DNS servers assigned into my
resolv.conf. I then took these two IPs and added them to my forwarders
section in my named.conf. Rebooted and name lookup is much faster now.

It only took my wife grumping about having to hit refresh 20+ times to
bring up a web page in order for me to fix this since we've moved and
changed ISPs.

Thanks for the ideas everyone.


On Sun, 2 Jan 2005 10:52:14 -0500, David Daugherty
<david.daugherty at gmail.com> wrote:
> Ah, yes..dig. Forgot that it had a resolve time in there.
> 
> Here's a perfect example of the slowness I'm talking about:
> su-2.05b# dig yahoo.com
> 
> ; <<>> DiG 8.3 <<>> yahoo.com
> ;; res options: init recurs defnam dnsrch
> ;; res_nsend: Operation timed out
> su-2.05b# dig yahoo.com
> 
> ; <<>> DiG 8.3 <<>> yahoo.com
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1563
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 5, ADDITIONAL: 0
> ;; QUERY SECTION:
> ;;      yahoo.com, type = A, class = IN
> 
> ;; ANSWER SECTION:
> yahoo.com.              5M IN A         216.109.112.135
> yahoo.com.              5M IN A         66.94.234.13
> 
> ;; AUTHORITY SECTION:
> yahoo.com.              1d6h52m8s IN NS  ns2.yahoo.com.
> yahoo.com.              1d6h52m8s IN NS  ns3.yahoo.com.
> yahoo.com.              1d6h52m8s IN NS  ns4.yahoo.com.
> yahoo.com.              1d6h52m8s IN NS  ns5.yahoo.com.
> yahoo.com.              1d6h52m8s IN NS  ns1.yahoo.com.
> 
> ;; Total query time: 6179 msec
> ;; FROM: datasphereweb.com to SERVER: 127.0.0.1
> ;; WHEN: Sun Jan  2 09:55:17 2005
> ;; MSG SIZE  sent: 27  rcvd: 149
> 
> First one didn't resolve in time. Second one, 6 seconds!!!
> 
> On Sun, 2 Jan 2005 10:49:28 -0500, David Daugherty
> <david.daugherty at gmail.com> wrote:
> > The problem with resolv.conf is that it just puts insightbb.com in
> > there. Doing a whois on insightbb.com gives a few DNS servers but none
> > of them are any speedier lookups then the others. If I put the IP that
> > insightbb.com resolves to it's still slow.
> >
> >
> > On Sun, 2 Jan 2005 09:41:20 -0600, Josh Paetzel <josh at tcbug.org> wrote:
> > > On Sunday 02 January 2005 09:22, David Daugherty wrote:
> > > > I'm running BIND 9 for my own DNS and I'm connecting to the
> > > > Internet through cable modem. In my named.conf I have a forwarders
> > > > section where I put the IPs for my ISPs DNS. Since my connection to
> > > > the ISP is DHCP how can I determine the DNS IPs that have been
> > > > assigned? I don't see it when man'ing ifconfig.
> > >
> > > /etc/resolv.conf lists which nameservers your system is using.
> > >
> > > (Hope I didn't completely interpret your question) :-/
> > >
> > > --
> > > Thanks,
> > >
> > > Josh Paetzel
> > >
> >
> > --
> > Doc
> >
> > david.daugherty at gmail.com
> > 317.536.1858
> >
> > "The only thing necessary for evil to triumph is for good men to do
> > nothing."
> >   - Edmund Burke
> >
> 
> --
> Doc
> 
> david.daugherty at gmail.com
> 317.536.1858
> 
> "The only thing necessary for evil to triumph is for good men to do
> nothing."
>   - Edmund Burke
> 


-- 
Doc

david.daugherty at gmail.com
317.536.1858

"The only thing necessary for evil to triumph is for good men to do
nothing."
   - Edmund Burke