From: Gary D. Margiotta (no email)
Date: Wed May 01 2002 - 15:00:00 EDT
To chime in on this as well, in running reverse lookups for our analog
reports, almost 65% of the hosts hitting one of the sites were
unresolveable. This server receives over 50,000 distinct hosts requesting
pages per day, and 65% of 50,000 is just around 35,000 hosts. That's a
lot of damn hosts which don't resolve. And while they're mostly part of
dhcp pools, just setting up a blanket reverse zone shouldn't be all that
hard.
From a sysadmin standpoint, sometimes the upstream breaks their reverse
delegations, and at times it is definitely easier to just deal with it
than to try to fix it. It's like that story where the guy puts a finger
in the dam to stop one leak and 5 others pop up. I've got machines on 2
backbones which the upstream just doesn't want to either give me the
reverse delegation, or they don't know how to do it. How am I supposed to
deal with that? While I want to be proper and make sure my systems comply
properly, my hands are tied.
While I agree that having the reverses work should be a requirement (I try
to be pretty anal about that stuff myself), with the speed that people
switch providers and netblocks these days, it's almost too much to keep up
with. I just went through a T1 switch with a client and have the honor of
dealing with 9 separate IP blocks among 3 different providers to make sure
that reverses are set up properly and maintainence is kept up on. They've
got a 1-year contract with the current provider, so who knows... maybe
next year I'll be moving again. Yes, that's my job and I get paid for it,
but seriously, when does it get to the point that some people just don't
care anymore? That's why you have a 65% unresolve rate.
Now, if you're a braindead sysadmin and don't know what a PTR record is,
or how to set them up and administer them effectively, then that's a
different story which requires severe beatings. Not knowing how to do it
and not having the time to keep up with it are 2 totally different things.
-Gary
Running Windows is kinda like playing blackjack:
User stays on success, reboots on failure
On Wed, 1 May 102, chris.laco wrote:
> [snip]
> > Officialy u are allowed to call them idiots.
> > ptr is a fine invention and should be used.
> > they have problems with many services if not ptr-ing. thier
> > loss.
>
> I've been following this thread and the /RFC Ignorant/ variations ,
> and I feel like I need to put something in the pool...
>
> While I agree reverse DNS being broken is bad, sometimes, they are NOT
> spammers, and sometimes it's NOT their fault or under their control.
>
> For example, my ISP [UUNet] constantly loses/drops/fubars/breaks
> reverse DNS delegation to my IP block to my DNS...so often that I've
> given up trying to cope with it.
>
> I don't like it, but it's a problem that will probably never get
> fixed...and 9 times out of 10, if has no effect on anything else.
>
> Granted, if I couldn't send email anywhere because of it, you bet i'd
> yell a little louder, but that day will probably never happen. - To
> unsubscribe, send mail to with content (not
> subject): unsubscribe postfix-users
>
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