> From: "Pawel Rutkowski" <rut...@freelance-worker.net> > To: <bind-users@lists.isc.org> > Subject: Bind sometimes SERVFAIL > Date: Wed, 11 Nov 2009 07:42:14 +0100 > > Hello, > > My Internet ISP give two nameservers address. > But when I'm asking those two servers sometimes I get: > [r...@linux ~]# host d.yimg.com ns.my.isp > Using domain server: > Name: ns.my.isp > Address: ns.my.isp#53 > Aliases: > Host d.yimg.com not found: 2(SERVFAIL)
I just saw the same thing: metis% host d.timg.com Host d.timg.com not found: 3(NXDOMAIN) metis% !! host d.timg.com Host d.timg.com not found: 3(NXDOMAIN) metis% host d.yimg.com d.yimg.com is an alias for geoycs-d.gy1.b.yahoodns.net. geoycs-d.gy1.b.yahoodns.net is an alias for fo-anyycs-d.ay1.b.yahoodns.net. fo-anyycs-d.ay1.b.yahoodns.net has address 98.137.88.88 metis% named -v BIND 9.6.1-P1 Above executed in the space of about a minute... > > but sometimes I get: > > [r...@linux ~]# host d.yimg.com ns.my.isp > Using domain server: > Name: ns.my.isp > Address: ns.my.isp#53 > Aliases: > d.yimg.com is an alias for geoycs-d.gy1.b.yahoodns.net. > geoycs-d.gy1.b.yahoodns.net is an alias for fo-anyycs-d.ay1.b.yahoodns.net. > fo-anyycs-d.ay1.b.yahoodns.net has address 98.137.80.54 > > > He explain me this thats a normal because of this: > http://www.faqs.org/rfcs/rfc2308.html > Some resolvers incorrectly continue processing if the authoritative > answer flag is not set, looping until the query retry threshold is > exceeded and then returning SERVFAIL. This is a problem when your > nameserver is listed as a FORWARDER for such resolvers. If the > nameserver is used as a FORWARDER by such resolver, the authority > flag will have to be forced on for NXDOMAIN responses to these > resolvers. In practice this causes no problems even if turned on > always, and has been the default behaviour in BIND from 4.9.3 > onwards. > > Is this true ? > > Thanks > Pawel R. > > > > _______________________________________________ > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users --------------------------------------------------------------------- Gregory Hicks | Principal Systems Engineer | Direct: 408.569.7928 People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf -- George Orwell The price of freedom is eternal vigilance. -- Thomas Jefferson "The best we can hope for concerning the people at large is that they be properly armed." --Alexander Hamilton _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
