[wellylug] Debian message

[Daniel Pittman]

Lee Begg <llnz at paradise.net.nz> writes:
> On Sat, 10 Oct 2009 15:40:43 John Durham wrote:
>
>> I just started up my Debian web server after a few days down. The domain
>> name was being renewed, so the hardware took a rest for a while. It
>> produced this message: etth0: No IPV6 routers present.
>>
>> The router is plugged in and appears active.  Any comments?
>
> It's nothing to worry about.
>
> Basically, your server has tried to find a IPv6 router automatically and it
> hasn't found one. IPv4 (the version of IP most people use currently) was
> probably fine.

*nod*  This is the equivalent of DHCP for IPv6; the client and the router
communicate automatically to work out the IPv6 routing.

The one thing I would note is that this indicates that IPv6 is enabled on the
server.  Aside from the router stuff, there will *also* be an automatically
generated link-local IPv6 address.

This means that any other machine on the same physical network segment can
talk to your server via IPv6, and your IPv4 firewall will not have any
influence over that.

This may, or may not, be a problem, but it is better that you are aware of the
situation so you can assess the (lack of) risk for yourself.

        Daniel
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