On Fri, Feb 26, 2010 at 2:48 AM, Leen de Braal
Hi all,
Having some troubles with dns. Sometimes when sending mail it is not possible to resolve the addressee's domain. When checking manualy with dig, the domain will be shown. I have been checking this, when trying another domain (from which I am quite sure it will not be cached) I can see that the MX record is not resolved by the local server. When checking again, it gives the right answer. Could this be some time-out that is set too short, and is there a way to make it wait a little longer, or check the second nameserver in resolv.conf (which is the one from the ISP) before the time-out?
Config as follows: - openSUSE 11.2 does routing, firewall, and named. - openSUSE 11.1 does mail, and checks the nameserver on 11.2.
I have seen this happen, with DNS queries, when I fire up workstations (including the server hosting named) the first thing in the morning. I do boot the server first and when it comes online, I boot the workstations. The DLink DSL router chokes on too many simultaneous requests. I know this for sure because ping requests to external hosts (via IP numbers) also time out. Everything settles down after a couple of minutes though. I suggest you make sure that you do not have any network bottle necks, before suspecting your internal DNS server. You can use tcdump, wireshark etc. to monitor network traffic. HTH -- Arun Khan -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org