Someone wrote (privately, so I'm not giving a name): > There's a bit of problem with the DNS. You might want to jump over to > http://dns.squish.net/ and run an NS traversal for biplane.com.au -- > pps.com.au's DNS is befuddled.
This is true. Two of the four PPS nameservers do not have glue records in .com.au. What I don't understand is how a trace can compete at all, if there is no glue. That is, root should return a set of referrals to .au, one of the .au servers then returns referrals to .com.au, one of those returns referrals to biplane.com.au, one of those can then answer the actual query. If there are no referrals to x.com.au in .com.au, how can a query "jump the gap"? Because I can see that happening in a trace. Here are two traces for pps.com.au. The first shows referrals in .com.au, the second does not. It looks as if n.au somehow answered directly, but g.au did not. So I'm confused (and possibly befuddled). Firstly as to why n.au would have *any* information about pps.com.au, and secondly why g.au would have different information than n.au :-( Regards, K. kauer@karl:~$ dig +trace pps.com.au ns ; <<>> DiG 9.7.1-P2 <<>> +trace pps.com.au ns ;; global options: +cmd . 113025 IN NS c.root-servers.net. . 113025 IN NS a.root-servers.net. . 113025 IN NS m.root-servers.net. . 113025 IN NS k.root-servers.net. . 113025 IN NS f.root-servers.net. . 113025 IN NS b.root-servers.net. . 113025 IN NS j.root-servers.net. . 113025 IN NS d.root-servers.net. . 113025 IN NS g.root-servers.net. . 113025 IN NS l.root-servers.net. . 113025 IN NS h.root-servers.net. . 113025 IN NS e.root-servers.net. . 113025 IN NS i.root-servers.net. ;; Received 512 bytes from 139.130.4.4#53(139.130.4.4) in 7 ms au. 172800 IN NS o.au. au. 172800 IN NS n.au. au. 172800 IN NS a.au. au. 172800 IN NS l.au. au. 172800 IN NS m.au. au. 172800 IN NS r.au. au. 172800 IN NS h.au. au. 172800 IN NS p.au. au. 172800 IN NS s.au. au. 172800 IN NS u.au. au. 172800 IN NS v.au. au. 172800 IN NS b.au. ;; Received 496 bytes from 192.112.36.4#53(g.root-servers.net) in 348 ms com.au. 172800 IN NS q.au. com.au. 172800 IN NS j.au. com.au. 172800 IN NS i.au. com.au. 172800 IN NS h.au. com.au. 172800 IN NS o.au. com.au. 172800 IN NS l.au. com.au. 172800 IN NS g.au. com.au. 172800 IN NS n.au. com.au. 172800 IN NS m.au. com.au. 172800 IN NS p.au. com.au. 172800 IN NS k.au. ;; Received 408 bytes from 2607:f140:ffff:fffe::e#53(s.au) in 193 ms pps.com.au. 14400 IN NS ppsdns6.pps.com.au. pps.com.au. 14400 IN NS ppsdns4.pps.com.au. pps.com.au. 14400 IN NS ppsdns2.pps.com.au. pps.com.au. 14400 IN NS ppsdns1.pps.com.au. pps.com.au. 14400 IN NS ppsdns3.pps.com.au. ;; Received 214 bytes from 202.65.12.72#53(i.au) in 16 ms pps.com.au. 3600 IN NS ppsdns3.pps.com.au. pps.com.au. 3600 IN NS ppsdns6.pps.com.au. pps.com.au. 3600 IN NS ppsdns2.pps.com.au. pps.com.au. 3600 IN NS ppsdns4.pps.com.au. pps.com.au. 3600 IN NS ppsdns1.pps.com.au. ;; Received 342 bytes from 2406:a000::5#53(ppsdns6.pps.com.au) in 21 ms kauer@karl:~$ dig +trace pps.com.au ns ; <<>> DiG 9.7.1-P2 <<>> +trace pps.com.au ns ;; global options: +cmd . 113019 IN NS m.root-servers.net. . 113019 IN NS h.root-servers.net. . 113019 IN NS f.root-servers.net. . 113019 IN NS e.root-servers.net. . 113019 IN NS j.root-servers.net. . 113019 IN NS i.root-servers.net. . 113019 IN NS k.root-servers.net. . 113019 IN NS l.root-servers.net. . 113019 IN NS d.root-servers.net. . 113019 IN NS b.root-servers.net. . 113019 IN NS a.root-servers.net. . 113019 IN NS g.root-servers.net. . 113019 IN NS c.root-servers.net. ;; Received 512 bytes from 139.130.4.4#53(139.130.4.4) in 3 ms au. 172800 IN NS b.au. au. 172800 IN NS r.au. au. 172800 IN NS a.au. au. 172800 IN NS o.au. au. 172800 IN NS p.au. au. 172800 IN NS v.au. au. 172800 IN NS l.au. au. 172800 IN NS m.au. au. 172800 IN NS n.au. au. 172800 IN NS h.au. au. 172800 IN NS s.au. au. 172800 IN NS u.au. ;; Received 496 bytes from 2001:dc3::35#53(m.root-servers.net) in 178 ms pps.com.au. 14400 IN NS ppsdns3.pps.com.au. pps.com.au. 14400 IN NS ppsdns2.pps.com.au. pps.com.au. 14400 IN NS ppsdns4.pps.com.au. pps.com.au. 14400 IN NS ppsdns1.pps.com.au. pps.com.au. 14400 IN NS ppsdns6.pps.com.au. ;; Received 214 bytes from 69.36.145.34#53(n.au) in 227 ms pps.com.au. 3600 IN NS ppsdns2.pps.com.au. pps.com.au. 3600 IN NS ppsdns3.pps.com.au. pps.com.au. 3600 IN NS ppsdns4.pps.com.au. pps.com.au. 3600 IN NS ppsdns6.pps.com.au. pps.com.au. 3600 IN NS ppsdns1.pps.com.au. ;; Received 342 bytes from 2406:a000::5#53(ppsdns2.pps.com.au) in 22 ms -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (ka...@biplane.com.au) +61-2-64957160 (h) http://www.biplane.com.au/kauer/ +61-428-957160 (mob) GPG fingerprint: DA41 51B1 1481 16E1 F7E2 B2E9 3007 14ED 5736 F687 Old fingerprint: B386 7819 B227 2961 8301 C5A9 2EBC 754B CD97 0156
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