Actually, I just noticed in MT that you can set the cache-max-ttl.
So, I set it to 15 minutes.

On Sun, Dec 6, 2009 at 11:11 PM, can...@believewireless.net
<p...@believewireless.net> wrote:
> Seeing the same thing.  Flushing the cache seems to fix it for a
> while.  Looks like it's been a bug for a little while:
>
> http://forum.mikrotik.com/viewtopic.php?f=2&t=35891
>
> I'm going to try the script mentioned to flush the cache every 15 minutes.
>
> On Sun, Dec 6, 2009 at 10:57 PM, RickG <rgunder...@gmail.com> wrote:
>> Thanks Josh! I figured that out too but it didnt come back quickly but
>> rather took a few mnutes. So I thought maybe it was coincidence and there is
>> some other issue. The interesting part is that I changed my DNS settings on
>> my PC so wouldnt that bypass any Mikrotik issues? -RickG
>>
>> On Sun, Dec 6, 2009 at 10:40 PM, Josh Luthman
>> <j...@imaginenetworksllc.com>wrote:
>>
>>> But a quick "fix" is to flush your MT DNS then your PC.   Should have
>>> mention that before, sorry.
>>>
>>> On 12/6/09, RickG <rgunder...@gmail.com> wrote:
>>> > OK, 3 times in the past week that I've noticed I could not get to
>>> > www.google.com via the web, nor ping it, and DNS could not resolve it. I
>>> > COULD ping and resolve google.com. I tried changing my DNS to OpenDNS
>>> and
>>> > Public DNS (4.2.2.1) but had the same results. M firewall is an RB450G
>>> > running  4.3. Is anyone out there having this issue?
>>> > -RickG
>>> >
>>> >
>>> >
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