Re: DNS lookup issue in 2.1.9

On 16 August 2016 at 21:36, John Dowdell <[email protected]> wrote:

>
>
> On Tuesday, 16 August 2016, Achim Weber <[email protected]> wrote:
>
>> Hi John,
>>
>> how is your network physically connected?
>>
>> Achim
>
>
> On Red, wired Ethernet to Netgear ADSL modem. Modem does DHCP server.
> Using ISP (TalkTalk in UK) DNS servers.
>
> On green, small number of desktops and printer wired via switch. IPCOP
> serves DHCP.
>
> On blue, two Netgear APs connected by wired Ethernet. IPCOP serves DHCP.
>
> I have extracted the firewall to soak test at home, similar setup but BT
> Infinity. So far no problem. I have read that some set IPCOP to serve
> Google DNS.
>
> The problem in the office is that it all works for about 5 to 10 minutes,
> then DNS stops working.
>
> Regards
> John
>

OK so I have the problem recurring now on my soak test rig with IPCOP
2.1.9. I find that a client on Green (I saw the problem on Blue too but not
testing that yet) cannot web browse to any internet site. However nslookup
and dig do return the correct IP address of web sites (taking care to use
ones probably not in any cache), but traceroute on both the site name and
IP address terminate at the Green interface on IPCOP.

If it helps, I'm running NTP service.

Any help appreciated.
best regards
John
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