Hello, I'm having a problem with the IANA blackhole DNS-Servers resolving RFC1918 IPs. Normally I'm getting a NXDOMAIN reply and this is reported back to the client. With one resolver we're getting SERVFAIL for every query instead of NXDOMAIN. Example: Resolver 1 (working): # dig @192.175.48.42 1.1.168.192.in-addr.arpa PTR ; <<>> DiG 9.2.1 <<>> @192.175.48.42 1.1.168.192.in-addr.arpa PTR ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 50669 ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;1.1.168.192.in-addr.arpa. IN PTR ;; AUTHORITY SECTION: 168.192.in-addr.arpa. 300 IN SOA prisoner.iana.org. hostmaster.root-servers.org. 2004051800 1800 900 604800 300 ;; Query time: 11 msec ;; SERVER: 192.175.48.42#53(192.175.48.42) ;; WHEN: Tue Mar 28 13:29:57 2006 ;; MSG SIZE rcvd: 119 Resolver 2 (failing): # dig @192.175.48.42 1.1.168.192.in-addr.arpa PTR ; <<>> DiG 9.2.1 <<>> @192.175.48.42 1.1.168.192.in-addr.arpa PTR ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 62187 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;1.1.168.192.in-addr.arpa. IN PTR ;; Query time: 16 msec ;; SERVER: 192.175.48.42#53(192.175.48.42) ;; WHEN: Tue Mar 28 13:21:02 2006 ;; MSG SIZE rcvd: 42 So every request to resolve RFC1918 IPs with resolver #2 times out and takes a long time to finish. I think the reason is one of the anycast servers acting abnormal. A trace from resolver 2 points to p80.net as provider: [..] 4 ge0-0-pr1.AMS.router.colt.net (212.74.66.146) 14.100 ms 14.122 ms 14.096 ms 5 cr1.nl.p80.net (195.69.145.52) 14.839 ms 14.731 ms 14.123 ms 6 blackhole-2.iana.org (192.175.48.42) 14.703 ms 15.020 ms 14.861 ms Perhaps someone on this list has a shortcut to get the server back to normal again? Regards, Sebastian -- GPG Key-ID: 0x76B79F20 (0x1B6034F476B79F20) Wehret den Anfaengen: http://odem.org/informationsfreiheit/ 'Are you Death?' ... IT'S THE SCYTHE, ISN'T IT? PEOPLE ALWAYS NOTICE THE SCYTHE. -- Terry Pratchett, The Fifth Elephant