[Gllug] Resolving question

[Jack Bertram]

* Jan Minar <jjminar at FastMail.FM> [041130 15:50]:
> On Tue, Nov 30, 2004 at 03:15:22PM +0000, Jack Bertram wrote:
> > Do _all_ (normal) programs use the resolving order defined in
> > resolv.conf?  I anticipate some DNS difficulties over the next few days
> > and want to know whether I can add /etc/hosts entries to overcome these
> > for one particular server.
> 
> Shor answer: yes.
> 
> It's host.conf, not resolv.conf

Oh yes.  What's the relationship between nsswitch.conf and host.conf?

> As doing DNS queries more than often requires elevated privileges, I
> wouldn't expect userland programs to implement it themselves, even if we
> didn't consider the sheer stupidity of doing that in the first place.
> That said, tcpdump is Your friend if you are in doubt.
> 
> Quoting the resolv.conf(5) manpage:
> 
> | The resolver is a set of routines in the C library that provide access
> | to the Internet Domain Name System. The resolver configuration file
> | contains information that is read by the resolver routines the first
> | time they are invoked by a process.
> 
> -- so You maybe will have to restart Your programs, but the modern
> resolver implementations may check for a modification of the config
> files...?  Again, tcpdump is Your friend.

Good stuff - thanks very much

jack
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