Why can't I resolve www.schwab.com

[Kevin Darcy]

I can resolve it just fine. The nameservers for www.schwab.com (yes, it
seems to be a zone unto itself) are both in the 162.93.*.* address
range. Do you by any chance have any special routing or firewall rules
that might prevent access to that network. I'll note that the
aforementioned servers appear to be load-balancers rather than
full-blown nameservers: they only seem to respond to A RR queries, and
the TTL's are quite low (5 minutes for the NS records, 15 seconds for
the A record). This forces everyone else's nameservers to constantly
query theirs, and even *intermittent* routing failures could result in a
significant number of lookup failures.


- Kevin

Stella Mutya wrote:

> Hello there,
>
> I've been tearing my brains out with this problem and
> can use any help from anyone.
>
> I don't understand why my DNS cannot resolve
> www.schwab .com but it can resolve everything else.
> Here's what I'm getting with debug on nslookup:
>
> > www.schwab.com
> Server:  hermestest.colo.com
> Address:  xx.x.xx.xx
>
> ;; res_mkquery(0, www.schwab.com, 1, 1)
> timeout (5 secs)
> timeout (10 secs)
> timeout (20 secs)
> ------------
> Got answer:
>     HEADER:
>         opcode = QUERY, id = 12606, rcode = SERVFAIL
>         header flags:  response, want recursion, recursion
> avail.
>         questions = 1,  answers = 0,  authority records = 0,
> additional = 0
>
>     QUESTIONS:
>         www.schwab.com, type = A, class = IN
>
> ------------
> ;; res_mkquery(0, www.schwab.com.colo.com, 1, 1)
> ------------
> Got answer:
>     HEADER:
>         opcode = QUERY, id = 41434, rcode = NXDOMAIN
>         header flags:  response, auth. answer, want
> recursion, recursion avail.
>         questions = 1,  answers = 0,  authority records = 1,
> additional = 0
>
>     QUESTIONS:
>         www.schwab.com.colo.com, type = A, class = IN
>     AUTHORITY RECORDS:
>     ->  colo.com
>         ttl = 21600 (6 hours)
>         origin = hermestest.colo.com
>         mail addr = root.colo.com
>         serial = 2000081122
>         refresh = 10800 (3 hours)
>         retry   = 3600 (1 hour)
>         expire  = 604800 (7 days)
>         minimum ttl = 21600 (6 hours)
>
> ------------
> *** hermestest.colo.com can't find www.schwab.com:
> Non-existent host/domain
>
> Thanks for the help.
>
> Regards,
> Stella
>
> =====
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Mail - Free email you can access from anywhere!
> http://mail.yahoo.com/