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Joe
Sorry about the email format - Outlook has a mind of its own at times :(
We have been trying to contact the various companies our clients are having
issues with. I've personally spent hours trying to get Ticketmaster to escalate
my query to somebody with a $clue, but got stuck in their CS system from hell :(
The PTR records are fine - many of them have been there for many years.
Somebody else pointed out to me offlist that some are missing A records, so
we'll address that.
We've checked the IPs against blacklists and nothing is showing that we can
find.
While *some* of the IP ranges we are using might be "secondhand" several of
them are shiny and new and were never used prior to them allocated to us. Of
the "used" ranges none were problematic and some come from another Irish ISP
that has been consumed via M+A (not by us!).
If you or anyone else can suggest mailing lists where I might stumble across
people who work for some of these companies please do let me know - it'd be
appreciated.
Regards
Michele
--
Mr Michele Neylon
Blacknight Solutions
Hosting, Colocation & Domains
https://www.blacknight.com/
https://blacknight.blog/
http://ceo.hosting/
Intl. +353 (0) 59 9183072
Direct Dial: +353 (0)59 9183090
-------------------------------
Blacknight Internet Solutions Ltd, Unit 12A,Barrowside Business Park,Sleaty
Road,Graiguecullen,Carlow,R93 X265, Ireland Company No.: 370845
________________________________________
From: Joe Abley <[email protected]>
Sent: Wednesday 23 November 2022 13:55
To: Michele Neylon - Blacknight
Cc: [email protected]
Subject: Re: [dns-operations] PTR Records for Broadband Network?
[EXTERNAL EMAIL] Please use caution when opening attachments from unrecognised
sources.
Hi Michele,
On Nov 23, 2022, at 07:46, Michele Neylon - Blacknight via dns-operations
<[email protected]> wrote:
<mime-attachment>
Hmm :-)
Many many moons ago we setup the PTR records for our network using a template
that clearly flagged that the IPs were static and used for hosting.
The result was that the IP 185.97.239.13 would end up with a PTR record of
239-13.colo.sta.blacknight.ie
Fast forward to 2022 and we now offer broadband to both businesses and
consumers, but unfortunately some streaming services and others are blocking
access. So our users have issues with Disney+, All4, Netflix and Ticketmaster
to name but a few examples. One of the issues appears to be the PTR records.
It might be worth reaching out to some of the people you know your customers
are struggling with specifically and seeing what they are looking for. The
presence and functional correctness of PTR records is known to be used as one
heuristic for e-mail abuse ops; I hadn't heard of it for things like Netflix
but what do I know?
I assume these PTR records you have made are correctly published. Have you
checked that the PTR targets (the 239-13.colo.sta.blacknight.ie name and its
friends) themselves resolve back to the right address?
Are the address ranges you are using for your customers tainted through some
prior abuse, e.g. by some other organisation that used to use them? Do they
appear on any of the usual blacklists?
I have seen informal guidance to access providers in the past on what naming
conventions are useful. I can't seem to find any of them right now but your
naming scheme does not seem ridiculous. I would be surprised if that's the
problem.
You might want also to ask this question on the kind of more general lists that
access and content providers hang out on.
Joe
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