Disappearing PTR Records? Qwest?

[phn at icke-reklam.ipsec.nu]

JoeZ <jz at zabram.com.removethis> wrote:

> Sorry, i'm a DNS newbie compared to anyone else on this group, but any
> insight into this issue is much appreciated.

> Ever hear of PTR records disappearing and then reappearing at random
> intervals?  This is what appears to be happening with our ISP's
> (Qwest, BTW) DNS servers.  This is causing us problems sending e-mail
> to certain domains.  I use a web-based tool,
> http://www.spiderhunter.com/tools/index.cfm?FuseAction=ReverseDNSLookup
> to check reverse DNS, and what i see is no PTR record whenever we
> can't send e-mail to this domain.  Then, the PTR magically reappears,
> we can send e-mail to the domain again and all is well until it
> happens again.

> Our other admin thinks I'm nuts because according to him DNS changes
> can't propagate that fast throughout the Internet.  He's using
> nslookup with our ISP's name servers and isn't seeing the PTR records
> disappear.  I think we're seeing a ripple effect and the site i use
> uses DNS servers which have records more indicative of what the rest
> of the Internet is currently seeing.

> Finally, what are the best DNS servers to use with nslookup?

> Thanks much, -JZ

What PTR records are you talking about ? ( ip-addresses )

There is no "general" disturbances this week :-) , whatever 
cauces you problem is limited to your ISP and/or your nameserver.



-- 
Peter Håkanson         
        IPSec  Sverige      ( At Gothenburg Riverside )
           Sorry about my e-mail address, but i'm trying to keep spam out,
	   remove "icke-reklam" if you feel for mailing me. Thanx.