[Iftop-users] v6 dns display error

Stuart Gathman stuart at gathman.org
Mon Feb 6 18:48:17 GMT 2017


On 02/06/2017 12:12 PM, Stuart D. Gathman wrote:
> On Mon, 6 Feb 2017, Paul Warren wrote:
>
>> I've not been able to reproduce this.  Can you confirm what version
>> of iftop you're using?
>
> It works if all IPv6 rDNS lookups succeed.  Even if most IPv6 rDNS
> lookups succeed, you might not notice the problem (and that is when it
> is the most dangerous).  The best way to reproduce is
> to run on a local IPv6 subnet where *none* of the IPv6 lookups succeed,
> or else point /etc/resolv.conf to a local dnsmasq with ip6.arpa set
> to always return NXDOMAIN.  Then all IPv6 will display as the same
> raw IP, and you will surely notice.
>
Not of the git commits since 1.0pre4, but I compiled up the latest and
greatest from the git repo you requested to confirm that the same bug is
still there after all these years.  I've attached config.h from the build.


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