[dns-operations] how common is a 66-record answer section, i wonder?
Mark Andrews
Mark_Andrews at isc.org
Mon Aug 14 05:28:10 UTC 2006
> on the one hand i find it heartening to see technology i pioneered (such as
> multiple PTR's at an in-addr node) or helped pioneer (such as the use of CNAME
> in the in-addr tree to make classless inaddr delegation possible) used with
> such style and verve.
>
> on the other hand i worry that things may be getting out of hand. for example:
I've never seen the benefit of multiple pointers in the
reverse tree. People just keep adding them until they
exceed the ability of the protocol to return. In reality
nothing depends on there being a matching ptr for a address.
The reverse however is not true.
Everytime I see something like this I realise that the
operators have no clue whatsoever. If they can't do DNS
what else can't they do.
Mark
> ---
>
> ; <<>> DiG 9.4.0a3 <<>> 10.47.210.200.in-addr.arpa ptr
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37396
> ;; flags: qr ra; QUERY: 1, ANSWER: 66, AUTHORITY: 2, ADDITIONAL: 2
>
> ;; QUESTION SECTION:
> ;10.47.210.200.in-addr.arpa. IN PTR
>
> ;; ANSWER SECTION:
> 10.47.210.200.in-addr.arpa. 85942 IN CNAME 10.0-63.47.210.200.in-addr.arpa.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR ftp.montealto.net.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.fugita.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.reymax.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.zubela.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.cestalto.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.lanfredi.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.magnetik.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.maharamy.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.okkdance.com.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.aquiveres.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.inkalaser.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.montealto.net.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.grupoexato.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.jimparcial.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.selectseed.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.tecmoldfer.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.reflorestar.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.sistemavida.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.g21ambiental.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.lbmredutores.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.montealtonet.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.sempreseguro.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.bma-borrachas.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.virgemontesina.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.cozinhasprojeto.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.angelotruckcenter.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.tksoftinformatica.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.retemaacionamentos.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.santacasamontealto.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.filadelfiaconstrutora.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR www.recantodaviolamontealto.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR pop3.montealto.net.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR smtp.montealto.net.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR zeus.montealto.net.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR fugita.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR reymax.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR zubela.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR webmail.montealto.net.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR webmail.montealtonet.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR cestalto.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR lanfredi.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR magnetik.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR maharamy.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR okkdance.com.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR aquiveres.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR inkalaser.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR grupoexato.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR jimparcial.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR rebarpecas.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR selectseed.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR tecmoldfer.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR reflorestar.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR sistemavida.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR g21ambiental.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR lbmredutores.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR sempreseguro.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR bma-borrachas.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR virgemontesina.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR cozinhasprojeto.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR angelotruckcenter.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR tksoftinformatica.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR retemaacionamentos.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR santacasamontealto.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR filadelfiaconstrutora.com.br.
> 10.0-63.47.210.200.in-addr.arpa. 85942 IN PTR recantodaviolamontealto.com.br.
>
> ;; AUTHORITY SECTION:
> 0-63.47.210.200.in-addr.arpa. 85942 IN NS ns.embratel.net.br.
> 0-63.47.210.200.in-addr.arpa. 85942 IN NS zeus.montealto.net.
>
> ;; ADDITIONAL SECTION:
> ns.embratel.net.br. 86385 IN A 200.255.253.241
> zeus.montealto.net. 125274 IN A 200.210.47.10
>
> ;; Query time: 1 msec
> ;; SERVER: 204.152.188.20#53(204.152.188.20)
> ;; WHEN: Mon Aug 14 04:47:01 2006
> ;; MSG SIZE rcvd: 1828
>
> ---
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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