DNS Issue?

[Neil Sheth]

I'm still not sure "what" is doing the lookup - nginx?  Apache on the
backend? (I have HostnameLookup off there.)

On Thu, Oct 16, 2008 at 3:33 AM, Tit Petric <black at scene-si.org> wrote:
> Basically, Kon was on point. Set up an internal DNS.
>
> Since you have atleast 8 servers, and I guess probably more, you really need
> to think about using a local DNS, or you will have to modify the hosts file
> on each one of those when&if you make changes.
>
> Lp
>
> Neil Sheth wrote:
>
> I just added the following in the /etc/hosts file for each of my servers:
>
> 10.0.0.2        mydomain.com
> 10.0.0.3        mydomain.com
> 10.0.0.4        mydomain.com
> 10.0.0.5        mydomain.com
> 10.0.0.6        mydomain.com
> 10.0.0.7        mydomain.com
> 10.0.0.8        mydomain.com
> (repeated for each IP I have assigned)
>
> A bit tedious, but seems to have solved the issue.  Any downsides to this?
>
> Thanks!
>
>
> On Thu, Oct 16, 2008 at 2:04 AM, CryptWizard <cryptwizard at gmail.com> wrote:
>
>
> Try adding an entry for it in /etc/hosts
>
> On Thu, Oct 16, 2008 at 7:13 PM, Neil Sheth <nsheth at gmail.com> wrote:
>
>
> I think this IS the issue, Kon.  For example, I do:
> traceroute -n 10.0.0.2
> Returns immediately
>
> I do
> traceroute 10.0.0.2
> Takes quite some time.
>
> Thoughts on how to resolve this?  Perhaps my settings in ifcfg-eth1
> aren't complete?
>
> On Wed, Oct 15, 2008 at 11:23 PM, Kon Wilms <konfoo at gmail.com> wrote:
>
>
> On Wed, Oct 15, 2008 at 11:16 PM, Neil Sheth <nsheth at gmail.com> wrote:
>
>
> Hmmm, it appears we have general problems with using our 10.0.0.x
> addresses.  For example, doing something like:
> ssh 10.0.0.2
> takes a LONG time to return.
>
> If I do something like
> 123.123.123 (my public IP),
> things return promptly.
>
> Perhaps this is a general networking question less than
> nginx-specific, but thought I'd check if anyone has any good
> suggestions!  Thanks!
>
>
> Let me guess your sshd is doing reverse DNS lookups and you have no
> internal DNS serving your 10.x.x.x network.
>
> Cheers
> Kon
>
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