We are seeing weird issues with customers domains: www.andra.com.au and www.wsid.com.au
Flushing the cache then doing a lookup for one then the other, often one will succeed and the other will fail. [NBRS-3.0 myhost named]# host www.andra.com.au www.andra.com.au is an alias for andra.com.au. andra.com.au has address 203.84.232.7 andra.com.au mail is handled by 10 mail.andra.com.au. [NBRS-3.0 myhost named]# host www.wsid.com.au Host www.wsid.com.au not found: 2(SERVFAIL) Flush the cache again and repeat the lookup, and the result may swap. Putting in a forwarder for those two domains resolves the issue. The domain is a little weird in that the whois shows the NS records as ns3.danielbeard.com and ns4.danielbeard.com, but the authoritative servers list ns.andra.com.au. Also, www.andra.com.au is a cname for andra.com.au. A trace shows: 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): create 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): join 26-Jun-2009 09:30:29.991 fetch 0xa0ddd60 (fctx 0xaf24578(www.andra.com.au/A)): created 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): start 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): try 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): cancelqueries 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): getaddresses 26-Jun-2009 09:30:29.991 dns_adb_createfind: name 0x9db43c8 is an alias (cached) 26-Jun-2009 09:30:29.991 dns_adb_destroyfind on find 0xa77d208 26-Jun-2009 09:30:29.991 dns_adb_createfind: name 0x9db4310 is an alias (cached) 26-Jun-2009 09:30:29.991 dns_adb_destroyfind on find 0xa77d208 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): no addresses 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): done 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): stopeverything 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): cancelqueries 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): sendevents 26-Jun-2009 09:30:29.991 fetch 0xa0ddd60 (fctx 0xaf24578(www.andra.com.au/A)): destroyfetch 26-Jun-2009 09:30:29.991 fctx 0xaf24578(www.andra.com.au/A'): shutdown Is this issue caused by bind caching the glue result from the root servers, then ignoring the authoritative result or something like that? The bind version is: 9.3.5 Thanks for any suggestions Nick _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
