[Bug 1787739] Re: postfix name lookup failed after dist-upgrade (Aug-2018)

[Andreas Hasenack]

> So definitely something going on with the IPV6. In your configuration,
> do you get IPV6 records for google.com?

I do:

andreas at nsn7:~/vagrant$ ssh -i .vagrant/machines/default/virtualbox/private_key vagrant at localhost -p 2222
Welcome to Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-36-generic x86_64)
...
vagrant at ubuntu-bionic:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
 ...
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 02:0d:76:ba:5b:1c brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic enp0s3
       valid_lft 86162sec preferred_lft 86162sec
    inet6 fe80::d:76ff:feba:5b1c/64 scope link 
       valid_lft forever preferred_lft forever
4: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:95:cf:d7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.130/24 brd 192.168.0.255 scope global enp0s8
       valid_lft forever preferred_lft forever
    inet6 2804:7f4:xxxx:xxxx:xxx:xxxx:xxxx:xxxx/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 2591766sec preferred_lft 604566sec
    inet6 fe80::a00:27ff:fe95:cfd7/64 scope link 
       valid_lft forever preferred_lft forever

vagrant at ubuntu-bionic:~$ host google.com
google.com has address 172.217.29.14
google.com has IPv6 address 2800:3f0:4001:803::200e
google.com mail is handled by 20 alt1.aspmx.l.google.com.
google.com mail is handled by 40 alt3.aspmx.l.google.com.
google.com mail is handled by 30 alt2.aspmx.l.google.com.
google.com mail is handled by 10 aspmx.l.google.com.
google.com mail is handled by 50 alt4.aspmx.l.google.com.


Also when asking bind9 directly:
vagrant at ubuntu-bionic:~$ host google.com 192.168.0.130
Using domain server:
Name: 192.168.0.130
Address: 192.168.0.130#53
Aliases: 

google.com has address 172.217.29.142
google.com has IPv6 address 2800:3f0:4001:80f::200e
google.com mail is handled by 30 alt2.aspmx.l.google.com.
google.com mail is handled by 10 aspmx.l.google.com.
google.com mail is handled by 40 alt3.aspmx.l.google.com.
google.com mail is handled by 50 alt4.aspmx.l.google.com.
google.com mail is handled by 20 alt1.aspmx.l.google.com.


vagrant at ubuntu-bionic:~$ dig @192.168.0.130 google.com -t aaaa +short
2800:3f0:4001:80f::200e

etc

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https://bugs.launchpad.net/bugs/1787739

Title:
  postfix name lookup failed after dist-upgrade (Aug-2018)

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