On 5/18/05, Marc Powell marc@ena.com wrote:
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Lee Parmeter Sent: Tuesday, May 17, 2005 11:48 AM To: centos@centos.org Subject: [CentOS] named server
I started the named server on CentOS and it seems to resolve DNS request OK, but it does not seem to retain the info for very long. From what I can tell using "dig", a domain's ip address is retained for less than 12 hours. So in the morning, it takes 4+ seconds to resolve again the first time. Is there an adjustment somewhere for this or is the caching named support not enabled by default?
Bind will use the Time To Live as configured by the owner of the domain name. There are other proxy DNS applications that allow you to override those values but I do not believe you can do so with bind.
Also, I thought it would be faster if I set named to use my ISP's named server as the first choice. Where do I set this up, in root.hints?
http://64.233.187.104/search?q=cache:OFlpPzQRRcUJ:www.rhce2b.com/clublin ux/RHCE-19.shtml+bind+forwarders&hl=en
19.3 Caching Only Name Servers
Not authoritative for any zone.
Uses DNS root servers or another name server known as a forwarder
to resolve DNS queries.
- To create a Forwarding Name Server, put the following line in the
"options" section of the /etc/named.conf file:
forwarders { 192.168.1.20; }; # replace with your upstream nameserver
- If you want BIND to only use it's forwarders to resolve hosts and
not the root name servers, put the following line in the "options" section of the /etc/named.conf file:
forward only;
The "forwarders" option specifies which DNS or DNS servers queriesshould be forwarded to for resolution.
What is the difference between use forward only+forwarders and directly set the nameserver inside resolv.conf ?
Anyone who knows more about "named" please feel free to comment!
Google knows a lot. =)
-- Marc _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos