On 13/12/2017 16:49, Tim+ wrote:
> Plusnet Support Team <
sup...@plus.net> wrote:
>> On 13/12/2017 13:24, Tim+ wrote:
>>> We’ve had Plusnet FTTC for over a year now and whilst things seem to stream
>>> okay, general web browsing has always progressed in fits and starts. It
>>> never seemed much (if any) better than when we had an ADSL connection.
>>>
>>> I read elsewhere about using Google’s DNS servers so I thought I’d have a
>>> go at changing mine. Unfortunately my Technicolour router’s DNS settings
>>> seem uneditable but from this site I was able to change the private LAN DNS
>>> settings.
>>>
>>>
https://uno.help/knowledge-base/article/how-to-change-dns-on-a-technicolor-tg582n
>>>
>>> Please don’t ask me to explain any of this as it’s way over my head BUT
>>> since setting up my primary DNS as 8.8.8.8 and secondary as 8.8.4.4 web
>>> browsing is vastly improved.
>>>
>>> Note that this doesn’t seem to change the DNS setting visible on the “home
>>> screen” of the router’s internet settings.
>>
>> What you're seeing is less likely due to Google's servers being more
>> responsive than ours, and more likely the result of you removing the
>> router's DNS proxy from the equation when performing lookups.
>
> That kinda begs the question why the router is set up like it is (or rather
> was) then surely?
Problems aren't typical. It's just much more likely to be the router
introducing the delay.
It wouldn't be wise for us to configure things like you have by default.
It's much more sensible to have the DNS assigned by our RADIUS servers
instead. There are services that won't work with the way you have things
configured, namely our parental control filtering, and if we need to
change the DNS servers we're assigning in future, you would have to make
manual changes in order to follow suit - not practical to expect this of
every customer.
>> i.e. before, you were doing this for each lookup:
>>
>> client device > router > plusnet DNS resolver
>>
>> Now, because you've told the router to assign Google's DNS to each
>> client directly (rather than have proxy requests through the router),
>> you're doing this:
>>
>> client device > google DNS resolver
>>
>> You'll probably find you have equal success assigning two of Plusnet's
>> resolvers in the same way:
>>
>> 212.159.6.9
>> 212.159.6.10
>> 212.159.13.49
>> 212.159.13.50
>
> Well now I’m already out of my depth. “Assigning ... resolvers”.
>
> As far as I can see my primary and secondary DNS settings are already the
> first two. Where do these extra DNS settings go?
They're not the ones being used though. Your router is getting assigned
the first two addresses, however you've effectively overidden this by
telling all connecting devices to use Google's DNS addresses instead.
Up to you really. Personally, I'd leave things set up as they are, but
change your primary server to one of the four I've listed above. In
theory, our servers should be more responsive as they're closer to you.
Leaving Google as secondary, gives you something to fall back on if our
servers fail for any reason.
If you want to try and get to the bottom of things then there's a load
of additional fiddling you can do, but if you're just happy it's working
then best leave as-is.