[wellylug] Debian message

[John Durham]

Daniel Pittman wrote:
> 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
This is the first suggestion I've heard abut such a possibility. Would 
hardly know where to start looking for data about it.

-- 
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