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)
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
