From: Mike Friedman (mikef_at_ack.berkeley.edu)
Date: Wed Jan 15 2003 - 09:37:01 PST
On Wed Jan 15 09:22:30 2003, Greg Merritt said:
> At 9:16 AM -0800 1/15/03, Bob Tidd wrote:
>
>>SBC has assured me that they have never heard of this ability (!)
>>presumably because the IP # is DHCP'd.
>
> Sigh... then the person you talked to doen't "get it". It
> has nothing to do with DHCP, but rather sbc's (evidently) poorly-kept
> DNS records. See if you can get your problem elevated to somebody at
> sbc who has a fundamental understanding of dns...
>
> (Sorry to rant, but this is an all-too-common problem for
> which there really is no excuse...)
I agree with Greg M. I'm still a PacBell DSL user and about once every week
or so, I get assigned an address that doesn't forward resolve (and sometimes
doesn't reverse resolve either)! This affects my ability to print via my
machine work machine, where I use TCP Wrappers which also does reverse/forward
lookup checking.
When this first started happening, about two years ago, I sent a note to
PacBell tech support. Their response was brief and could be paraphrased
as 'we don't understand what you're talking about'. I had complained
that I couldn't use certain services because their DNS did not contain a
forward entry for the DHCP address they had assigned me. Since the problem
would clear up when I disconnected and reconnected (getting a new IP address),
and doesn't occur very often anyway, I have never followed up with them on
this. (Now, when I first log in to my campus Unix shell account from home,
I run a short script that does essentially what the aforementioned uclink web
page does, to warn me when this problem is occurring, so that I can try to
obtain a new IP address before I bring up all my other applications).
I can sympathize with Greg's frustration, even though I don't encounter the
problem very often.
Mike
------------------------------------------------------------------------------
Mike Friedman System and Network Security
mikef_at_ack.Berkeley.EDU 2484 Shattuck Avenue
1-510-642-1410 University of California at Berkeley
http://ack.Berkeley.EDU/~mikef http://security.berkeley.edu
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