It has come to my attention in the course of moving the DNS for a number of domains that several of the ISPs in this country are mangling the TTLs on records queried by their recursive DNS servers. This behaviour seems to me to be undesirable in situations where someone may have set a record to a shorter TTL to facilitate smoother movement between hosting providers. In the cases I'm seeing, records with TTLs of 14400 are being handed out with TTLs of 86400 by the service provider's servers.
How common is this practice, and what are the benefits to the SP from doing it? From my perspective there is also the concern that this, for all intents and purposes appears to be bad practice, and serves to 'break' DNS in itself.
Anyone using 48V (Telco/Exchange supply) powered Ethernet switches? I'm
looking for something:
- 8-24 port 10/100 or 10/100/1000
- POE a bonus
- Openflow compatible a bonus too
Inspire Net rolled out a new customer outbounding smtp server last Friday.
If anyone wishes to add us to any trusted lists then please add the IP
address of 18.104.22.168. All user emails from Inspire Net will likely
come from that IP from now on.
Since then, we've had many issues getting emails accepted for delivery to
Xtra/Yahoo. For long periods of time they will defer all emails, then
accept a few, and then go back to deferring all emails.
The help page in question is
The answer seems to be to wait 4 hours. Which we've done. A lot.
I've contacted postmaster(a)xtra.co.nz about this issue and had no response.
For now, to keep our users happy, we're occasionally manually delivering
all emails to Xtra via our old, trusted SMTP server, but this is less than
ideal. We need our new SMTP server to be trusted.
My questions are:
-Does any one have any advice to give based on past experience on how long
this may last, or how to get our smtp server trusted?
-Does anyone from Telecom want to contact me about this issue?
Thanks in advance for any help given.
Just wanted to let everyone know that I've updated
http://ispmap.co.nz/topmap.html , I'd not updated it since March 2011.
The site does look very bad, but if you look on the main page there are
old versions 30-Mar-2011, 10-Jul-2007, 15-Aug-2006, 24-Apr-2006 which I
was able to recover. Unfortunately I lost all the annual updates between
2007 & 2011 due to a hardware issue at the time and this data was
Anyways, it's interesting to see how Oddesy & Vocus have taken off over
the years. If I'm missing any ISP's, when I say ISP's you're required to
have your own ASN at least, then flick me an email and I'll add you in.
If there happens to be any web designers on the list that would like to
make the site look a bit better on the eyes, also feel free to contact
Time for another beer :)