 |  |
Hmmm...
Re: DNS not propogating properly??
From: Higher Powered web
Date: Monday, July 10, 2000
Time: 4:14:16 pm
well I guess I have to do it. this sucks, because i'm changing isp's next
month and will have to do it all over again!!
Here's a question:
When I do a traceroute on any site on my server, the last hop goes to
208.1.125.162(good) but there is no name listed- every other site I checked
has a server name listed here.
Why is that, and is that not a problem?
also, once I change the ip addresses, will I loos all traffic?
I've never quite understood this part. I know about the cached servers(and
AOL's lovely caching process) but when the request actually comes to my DNS,
is it in the form of an ip or a name. If it's a name, then I'm safe,
correct?
If it's an ip, there will be no records in my DNS and it will fail, correct?
Thanks a million for the help!
James Sheffer
In a profound moment of clarity, I understood Global Homes Webmaster as
stating:
> On 07/10/00 at 14:15, Higher Powered web wrote:
>
>> also, here's everything in my DNS records. almost every record is set up
>> this way.
>> I know some of it I dont need, but I wasn't sure what , so i left it all.
>> It's always worked this way, but I'll change it in a heasrtbeat of someone
>> says I should :)
>
> It looks fine, except that, as Caio pointed out, there are no A or CNAME
> records for hosts in the michaeltyler.com. domain. The name michaeltyler.com.
> itself doesn't necessarily need an A record if you don't need it to be used as
> a hostname, but you do need either A or CNAME records for any hostnames that
> are going to be used as virtual domains for web hosting. Without that, no one
> will be able to find your web server using 'michaeltyler.com' or
> 'www.michaeltyler.com' as the domain name in a URL. With the example records
> you gave, all anyone can do in the michaeltyler.com. domain is send mail to
> 'michaeltyler.com' addresses.
>
> +Also, you didn't say what zone files all these records are in. The last four
> records (A records for higherpowered.com. hosts) only need to be in the
> higherpowered.com. zone file. They don't need to be in the michaeltyler.com.
> file.
>
>> I bring this up because my isp says the problem is in my DNS records, even
>> though they have been working for the last 6 months or more.
>
> Has your ISP checked the problem domains starting from the root servers? The
> problem I saw with one of the domains you mentioned before
> (harrispainthorse.com.) is that it is not delegated to _any_ name servers, let
> alone yours, by the root servers. That's not a problem in your DNS records,
> it's an InterNIC problem.
>
>> They also told me to change my ip numbers. About 6 months ago they assigned
>> me new numbers and told me I needed to change them. Then I was told I
>> didn't need to, as they were also keeping the old ones.
>
> This could certainly be a problem if your DNS records point to old addresses
> that your ISP is no longer routing to you.
>
>> they told me today to change them all in my DNS records. (Is there a way to
>> do a search and replace, or do I have to do each of the 50 records by hand?)
>
> You should be able to do it with an AppleScript. Chris Buxton might have a
> script that does such a thing -- check the list archives for the past week or
> two, Chris just posted a URL to a bunch of scripts that he and other Men and
> Micers have written.
>
>> They also said I didn't need to change anything with internic as they would
>> update their records automatically, and that if I changed all my DNS records
>> to the new numbers, there would be no latency problems- is this possible?
>
> It sounds like your ISP might be a little clueless about some of this. It will
> take at least the TTL of any changed records in order for the changes to get
> to name servers that may have cached the old info. Possibly longer for servers
> that ignore TTLs, against the rules, and cache records for as long as they
> feel like it. (Can you say, 'AOL'? I knew you could.) Also, it'll take up to
> the 'refresh' value in your SOA records in order for any secondaries to get
> the new data.
>
> As for InterNIC updating things automagically, it depends on what kind of
> change you're talking about. If you change the IP addresses of your name
> servers, you have to tell them about it so that they can change the
> corresponding A records on the root servers. IOW, they don't know anything
> about your name servers except what you tell them. If the registrar for your
> domains is Network Solutions, you'll need to submit a Host Modification
> request for each name server whose address changes. You'll then need to wait
> for the root servers to be updated after the change is completed (NSI updates
> the root servers twice a day, last I checked) plus the TTL of the A records
> before you can be sure that the entire net knows about the change. Other
> registrars should have analogous procedures.
>
>> i'm desperate at this time to get things working quickly, and will jump
>> through rings of fire if it will help :)
>
> Couldn't hurt. It will at least give you some exercise, and an occasional shot
> of adrenalin is good for the system... ;-)
>
> Christopher Bort
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