Re: AOL

In news:epXijodRGHA.4616@xxxxxxxxxxxxxxxxxxxx,
MDBJ <me@xxxxxx> stated, which I commented on below:
I have a PTR/spf record from my registrar (not my cable modem
provider) that works for aol's purposes..

the quote from comcast commercial is that, I have a static ip that is
subject to change due to network re-configurations on their end. if
they change it, I have to recreate my self signed certs, and fix my
SPF/ptr records at dyndns

I think wer'e talking about two different things here and there is a slight
misunderstanding, unless I'm missing something.

Keep in mind:
1. The cable companies OWN and CONTROL anything with THEIR IP addresses.
2. The registrar hosts YOUR domain name, and has NOTHING to do with the IP
addresses from the cable company.

These are two separate issues.

You may have an SPF record, and any other sort of records that are part of
your domain name, but the IP address belongs to the cable company and since
they have full control of their own IP blocks, they are the ONLY ones that
can create a PTR record for your mail server. So if you asked them to create
one based on the current IP, then when it changes, then THEY must change the
PTR record so the new IP you got will now reflect YOUR mail server.

What's a PTR for? If I used nslookup and entered an IP address, and there is
a PTR entry for it such as mail.YOURDOMAIN.com, it will return that name.
I'll use an example with one of Microsoft'smail server IP addresses:

=======================
C:\>nslookup
Default Server: london.nwtraders.msft
Address: 192.168.5.200

205.248.102.78
Server: london.nwtraders.msft
Address: 192.168.5.200

Name: mailc.microsoft.com
Address: 205.248.102.78
=======================

Does that make sense? A PTR for your current public IP cannot be controlled
by your registrar unless the registrar IS the cable company. If so, you can
inquire to the cable company to delegate control of an IP block (either the
whole block or subnetted), and then in that case, YOU would now have
control. But I highly doubt they will do that.

The registrar info and the IP address info are two separate issues, and are
controlled by the respective parties.

So yes, it is a PITA (pain in the...) that if the IP changes, then you have
to go thru all these hoops to change your certs, SPF records, and asking the
cable company to change the PTR on the new IP and remove your PTR from the
old IP.

Does that make sense?

Ace



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