Wildcards in reverse DNS

[Marc Haber]

On Sun, Jan 14, 2007 at 10:03:22AM +1100, Paul Colquhoun wrote:
> The problem with more than one '::' in an IPv6 address happens when they 
> are separated.
> 
> What is the full version of the following address?
> 
> 2001:db8::1428::57ab ?

undefined, I would say. Software seems to agree:

$ sudo ip addr add dev eth0 2001:db8::1428::57ab/128
Error: an inet prefix is expected rather than "2001:db8::1428::57ab/128".
$ sudo ip addr add dev eth0 2001:db8:1428::57ab/128
$ sudo ip addr show dev eth0
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:17:08:2e:59:87 brd ff:ff:ff:ff:ff:ff
    inet6 2001:db8:1428::57ab/128 scope global tentative
       valid_lft forever preferred_lft forever
$

Greetings
Marc

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