Re: DNS resolving issues with AT&T Customer Resolvers

[Brian Henson <marine64 () gmail com>]

Resolves here in Ohio and using 8.8.8.8 anycast address. on Timewarner

On Fri, Jul 8, 2016 at 3:55 PM, Hiawatha Demby <hdemby () email unc edu> wrote:

> C:\Users>nslookup bridgecatalog.com
> Server:  UnKnown
> Address:  192.168.0.1
>
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> *** Request to UnKnown timed-out
>
> C:\Users>nslookup bridgecatalog.com 8.8.8.8
> Server:  google-public-dns-a.google.com
> Address:  8.8.8.8
>
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> *** Request to google-public-dns-a.google.com timed-out
>
> C:\Users>nslookup bridgecatalog.com 68.94.156.15
> Server:  dns156r15.sbcglobal.net
> Address:  68.94.156.15
>
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> DNS request timed out.
>     timeout was 2 seconds.
> *** Request to dns156r15.sbcglobal.net timed-out
>
> Looks like the AT&T server are unavailable and the host is unresolvable on
> my end.
>
> On 7/8/2016 3:36 PM, Mark Keymer wrote:
>
> > Hi all,
> >
> > I have a client bridgecatalog.com and it seems like customers with AT&T
> > are unable to resolve his Domain. Maybe I am just overlooking something
> > here but it seems like all should be working. Looking at outside tool
> > things look ok too.
> > https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fdnscheck.pingdom.com%2f%3fdomain%3dbridgecatalog.com&data=01%7c01%7chdemby%40email.unc.edu%7ca1a111c28862421e835f08d3a7672759%7c58b3d54f16c942d3af081fcabd095666%7c1&sdata=OhVtZs8EqOGddhZh26uvcnMLBBZ5CiUTdeX9FXy5twk%3d
> >
> > (except the SOA hostmaster () solarek com e-mailing issues I see now)
> >
> > Other domains seem to work fine. So it isn't just everything is down. One
> > of the end-users I was working with currently has an ip of 99.7.225.25.
> > Power cycling the modem did not change thing. I also flushed DNS. If I
> > change to google's open resolvers things work fine. But not with default
> > resolvers to client.
> >
> > Anyone at AT&T that could check that the resolver's your clients are
> > using are able to resolve. (Home / SMB connections, etc)
> >
> > I am not sure the best way to go about trying to look into this issue if
> > other have suggestion I would also appreciate it.
> >
> > Sincerely,