Date: Tue, 7 Sep 2004 14:49:15 +0300 From: Ion-Mihai Tetcu <itetcu@apropo.ro> To: "Toomas Aas" <toomas.aas@raad.tartu.ee> Cc: questions@freebsd.org Subject: Re: named[353]: sysquery: no addrs found for root NS .......... Message-ID: <20040907144915.622af59a@it.buh.tecnik93.com> In-Reply-To: <200409071125.i87BP3qk005202@lv.raad.tartu.ee> References: <20040907130047.4334dc0e@it.buh.tecnik93.com> <200409071125.i87BP3qk005202@lv.raad.tartu.ee>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 7 Sep 2004 14:24:37 +0300 "Toomas Aas" <toomas.aas@raad.tartu.ee> wrote: > Hi! > > > >From time to time I get this: > > > > Sep 7 12:57:44 it named[353]: sysquery: no addrs found for root NS (d.root-servers.net) > > Sep 7 12:57:44 it named[353]: sysquery: no addrs found for root NS (a.root-servers.net) > > Sep 7 12:57:44 it named[353]: sysquery: no addrs found for root NS (c.root-servers.net) > > Sep 7 12:57:45 it named[353]: sysquery: no addrs found for root NS (h.root-servers.net) > > Sep 7 12:57:45 it named[353]: sysquery: no addrs found for root NS (f.root-servers.net) > > Sep 7 12:57:45 it named[353]: sysquery: no addrs found for root NS (b.root-servers.net) > > > > This problem plagued me for a long time on several FreeBSD 4 servers > running BIND 8 from the base system. Google finds numerous discussions > on this problem in various lists/newsgroups but a solution is rarely > offered. > > Finally, I found someone's theory in a NetBSD (or was it OpenBSD) > forum. I can't tell whether it is true or not, but it makes sense > to me. > > If your BIND is configured to use a forwarder and this forwarder is > really good then BIND (almost) never needs to contact the root servers. > The root zone times out in memory and it is not reloaded from disk. It > is only loaded when BIND is started. Thus, if your BIND finally needs > to contact a root name server after a long time of getting all > responses from forwarder, it turns out that the data for root zone is > not available... > > Now, as I said, I cannot tell whether this theory is true or not. What > I can say is that on all 4 machines where I run BIND I configured > one of two workarounds: > - use "forward only" so you *never* need to check the root zone > - do not use forwarders at all so you check the root zone fairly > frequently. It makes some sense; I have a forwarder on the LAN router that doesn't do much besides routing and dns caching. Thanks. -- IOnut Unregistered ;) FreeBSD "user"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040907144915.622af59a>