[Bug 1092691] Re: A way to disable AAAA lookups in the resolver (again)

[Humberto Jucá]

** Description changed:

  I like to known what's the way to disable DNS AAAA queries.
  Already have disabled all resources ipv6.
  
  1. Changes in grub:
  vim /etc/default/grub
-     GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1"
+     GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1"
  update-grub
  
  2. I'm using 12.04 LTS version (builtin ipv6 support)
- grep -i ipv6 /boot/config-3.2.0-24-generic 
-     CONFIG_IPV6=y
-     CONFIG_IPV6_PRIVACY=y
-     ...
+ grep -i ipv6 /boot/config-3.2.0-24-generic
+     CONFIG_IPV6=y
+     CONFIG_IPV6_PRIVACY=y
+     ...
  
  Before this i try with sysctl, but tcp6 sockets still alive.
  After grub changes this solve the question - i can disable ipv6 address and networks sockets too.
  
  But, internal lookups stay wrong.
  Some sites like www.caixa.gov.br are slow.
  
  When i sniff my connection i can see many DNS AAAA records and server fail
  Running "lynx www.caixa.gov.br"
  
  15:57:11.332463 IP 127.0.0.1.58734 > 127.0.0.1.53: 63741+ AAAA? www.caixa.gov.br. (34)
  15:57:16.337439 IP 127.0.0.1.58734 > 127.0.0.1.53: 63741+ AAAA? www.caixa.gov.br. (34)
  15:57:21.342488 IP 127.0.0.1.58067 > 127.0.0.1.53: 1244+ AAAA? www.caixa.gov.br.localdomain. (46)
  15:57:21.342579 IP 127.0.0.1.53 > 127.0.0.1.58067: 1244 NXDomain 0/1/0 (121)
  15:57:21.342648 IP 127.0.0.1.51657 > 127.0.0.1.53: 3236+ A? www.caixa.gov.br. (34)
  15:57:21.342723 IP 127.0.0.1.53 > 127.0.0.1.51657: 3236 1/0/0 A 200.201.161.106 (50)
  15:57:21.353289 IP 127.0.0.1.58482 > 127.0.0.1.53: 15390+ AAAA? www.caixa.gov.br. (34)
  15:57:26.358326 IP 127.0.0.1.58482 > 127.0.0.1.53: 15390+ AAAA? www.caixa.gov.br. (34)
  15:57:31.363381 IP 127.0.0.1.48398 > 127.0.0.1.53: 21648+ AAAA? www.caixa.gov.br.localdomain. (46)
  15:57:31.363487 IP 127.0.0.1.53 > 127.0.0.1.48398: 21648 NXDomain 0/1/0 (121)
  15:57:31.363560 IP 127.0.0.1.55657 > 127.0.0.1.53: 49860+ A? www.caixa.gov.br. (34)
  15:57:31.363643 IP 127.0.0.1.53 > 127.0.0.1.55657: 49860 1/0/0 A 200.201.161.106 (50)
  15:57:31.364319 IP 127.0.0.1.55431 > 127.0.0.1.53: 38110+ AAAA? www.caixa.gov.br. (34)
  15:57:36.369352 IP 127.0.0.1.55431 > 127.0.0.1.53: 38110+ AAAA? www.caixa.gov.br. (34)
  
  I do bind changes too
  vim /etc/default/bind9
-     RESOLVCONF=no
-     OPTIONS="-4 -u bind"
+     RESOLVCONF=no
+     OPTIONS="-4 -u bind"
  
  vim /etc/bind/named.conf.options
-         forward only;
-         forwarders {
-                 208.67.222.222;
-                 8.8.8.8;
-         };
- 
+         forward only;
+         forwarders {
+                 208.67.222.222;
+                 8.8.8.8;
+         };
  
  This dont solve AAAA requests.
  I like to known a way to prefer ipv4 queries (A) or disable ipv6 queries.
  
  When i'm using squid proxy the same problem occur.
- To solve this i need compile squid with --disable-ipv6. 
+ To solve this i need compile squid with --disable-ipv6.
  This works to Squid proxy, but i think that the best way is disable all DNS AAAA queries.
  
  This occur with lynx, wget and others.

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Title:
  A way to disable AAAA lookups in the resolver (again)

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