On Fri, Mar 28, 2014 at 04:41:03PM +0200, Roland RoLaNd wrote: > All, > I installed dnsmasq on a production web server to improve caching (we tend > to resolve alot of domains while serving pages) > my problem is that we have to use dhcp with the server, so cannot use > static ips. > with that in mind, the dhcpd client keeps overriding my resolv.conf > i can't lock the file as the dns provided by the dhcp service may change > (i don't have control over it) so what i need is the following; > nameserver 127.0.0.1 > nameserver (ip provided by the dhcp service)
No, you probably don't. Read the man page on resolv.conf:
nameserver Name server IP address
Internet address of a name server that the resolver should
query, either an IPv4
address (in dot notation), or an IPv6 address in colon (and
possibly dot) notation
as per RFC 2373. Up to MAXNS (currently 3, see <resolv.h>)
name servers may be
listed, one per keyword. If there are multiple servers, the
resolver library
queries them in the order listed. If no nameserver
entries are present, the
default is to use the name server on the local machine. (The
algorithm used is to
try a name server, and if the query times out, try the next,
until out of name
servers, then repeat trying all the name servers until a maximum
number of retries
are made.)
In other words, do all your lookups through the caching nameserver.
It'll have the side-effect that even more addresses get cached.
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