LinuxSA Mailing list archives

  From: Richard Russell <richard@yellowgoanna.com>
  To  : Mark Newton <newton@atdot.dotat.org>
  Date: Wed, 30 Apr 2003 15:23:55 +0930

Re: Apache reverse proxy -- why does this even work?

Mark Newton writes: 

<snip> 

> It'll look at the local nameserver if you specify no nameserver at all.

I assume this refers to 127.0.0.1:53, right? Mine is running on an internal 
ethernet interface, 192.168.x.y... 

> 
> This really isn't "a very grey area";  The resolver is very well documented
> with a lot of history behind it.  It either uses the nameservers you've
> told it to use (and -only- the nameservers you've told it to use) or there's
> a bug.

Hmm... a bug, hey ... It's RedHat 6.2, so it's quite old... possible... 

> (You might want to check environment variables, though:  most of the
> stuff in /etc/resolv.conf can be overridden by the process' environment)

OK, I've looked at /etc/init.d/httpd... I've checked /proc/<pid>/environ ... 
nothing. 

Is it possible that when it started, it loaded /etc/resolv.conf into memory, 
and since then, this local nameserver (which isn't 127.0.0.1, by the way -- 
it's the internal interface, 192.168.x.y) was commented out of 
/etc/resolv.conf, but the process still has it cached somehow? 

Also, I found /etc/host.conf, referred to in the resolver(3) man page. Its 
contents are: 

 ----
order hosts,bind
multi on
 ---- 

There is no man page for it. Anyone know if that could be affecting 
anything? 

Cheers 

rr 

-- 
Richard Russell
Yellow Goanna P/L
m: +61 412 827 805
e: richard@yellowgoanna.com
w: http://www.yellowgoanna.com/ 

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