Re: is it a newsgroup or marketplace? (was: What DNS to go for?)

On 2008-12-24, Walter Mautner <leaf.20.eatallspam@xxxxxxxxxxxxxxx> wrote:
Eric Pozharski wrote:

On 2008-12-23, Walter Mautner <leaf.20.eatallspam@xxxxxxxxxxxxxxx> wrote:
.....
I'm not interested in a static-FQDN with dynamic-IP (what's business
model for all of those free DNSes), I just need reliable DNS.  So my
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Noone urges you to acquire one.

Just checked -- score is 2-2

Didn't take it that way ...

Is it really that hard to read RFC1034? And pay a little attention to
section 2.3? What would happen when refresh period expires? That's not
personal, forget it.

WTF? What has running your own caching nameserver (with free choice of
forwarders) to do with a business domain?

Didn't get it. Should I read two last words in reverse order?

Whatever, yes. You don't need to obtain one from a domain business (=a
business domain) if you just want to serve your local lan.
However, I use fdns.net (free of charge) because my rotten brain often
forgets my own IP from abroad :)

And now the score is 3-1

*SKIP*
Btw., most distributions update bind - included the rootservers and certs
- regularly.

Does it mean that a common habit is to go for roots from the begining?

No. Use forwarders for external addresses, but create your own local zone to
be able to resolve lan hosts by name. Make sure you use .local as the
domainname for that purpose unless you got a fqdn (free or paid).
Rootservers are there just in case the forwarders are nonresponding.

No comments.

What did you mean with "refresh period expired"?

That's exact wording of RFC1034, Section 2.3:

- Access to information is more critical than instantaneous
updates or guarantees of consistency. Hence the update
process allows updates to percolate out through the users of
the domain system rather than guaranteeing that all copies are
simultaneously updated. When updates are unavailable due to
network or host failure, the usual course is to believe old
information while continuing efforts to update it.
The
general model is that copies are distributed with timeouts for
refreshing. The distributor sets the timeout value and the
recipient of the distribution is responsible for performing
the refresh.
In special situations, very short intervals can
be specified, or the owner can prohibit copies.

When I go online, B<pdnsd> has records for ISP's nameservers valid
(I<expire time> is 41day), but I<refresh period> and I<default ttl>
(1hour) are not. So B<pdnsd> attempts to refresh and fails (sometime).
Because nothing responds. IPs are pingable, so what? Whatever cached
record with its I<refresh period> expired must be refreshed, and that's
impossible too. Whenever that happens what B<pdnsd> can do? It fails.
If my understanding of reliability doesn't cheat me then it has no
option.

Is it that hard to grok or to believe?


--
Torvalds' goal for Linux is very simple: World Domination
Stallman's goal for GNU is even simpler: Freedom
.

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