For each WAN link, only specify the DNS server that apply to the ISP on that
link.

Keep DNS server setting for other ISP's separate



--- In SnapGearGroup@yahoogroups.com, "mcisar2005" <mcisar2005@...> wrote:
>
> Have an SG565 4.0.2 configured with two WAN connections(Cable, ADSL), each of
the two WAN links has 4 separate DNS servers configured (the same 4 on each
link) and it's set with DNS proxy enabled.
>
> This morning we had a power outage which knocked out the Cable for about 3
hours (which is the preferred gateway). Nothing seemed to be able to get out to
the internet so I started nosing around and found that I was able to get out
just fine by IP address. Popped open a command prompt on my windows box and
did...
>
> C:\Users\user1>nslookup
> Default Server: SG565-1
> Address: 10.10.10.1
> > microsoft.com
> Server: SG565-1
> Address: 10.10.10.1
> *** SG565-1 can't find microsoft.com: BAD ERROR VALUE
>
> Opened up a connection to the snapgear and started looking around in the
configuration but couldn't see anything I'd missed. Then happened to notice
that my email had connected... checked and the cable was still down, but
rechecked the DNS and it was fine.
>
> Soooo... DNS was down for the first 9 minutes of downtime and was up again
after about 15 minutes... so somewhere in those 6 minutes in between the DNS
proxy came to it's senses.
>
> Has anyone seen anything like this?
>
> Cheers,
> >>>>> Mike <<<<<
>