Re: BIND

From: wally (root_at_localhost.localdomain)
Date: 05/16/04 

Date: Sat, 15 May 2004 20:39:55 -0400

jpd wrote:

> On 2004-05-15, wally <root@localhost.localdomain> wrote:
>> jsut a quicke...
>> I have registered for a free DNS name form one of those dynamic ip
>> companies now i got xxx.yyy.com where yyy is the DNS name of the provider
>> and xxx is what i picked.
>
> What exactly have you ``registered''? One IN A RR or some agreement that
> they'll AXFR whatever you serve up as a zone into their nameservers?
> I think the former is the most likely.

I am using no-ip.com, I have no clue how they map me on their DNS, as i said
its a free welfare service.

>> given the below zone file, why can't it resolve mail.xxx.yyy.com
>> why dont i get any results when I do dig quires. I can connect to it with
>> nslookup - xxx.yyy.com from the internet, but it cant resolve any of the
>> internal hosts.
> [snip]
>
> One word: ``delegation''. Pointing a domain name somewhere is different
> from the yyy.com people delegating the subdomain to some other (==your)
> DNS server so you can give hosts names in that subdomain.

Well that might me my problem, I just figured that they will forward all the
traffic for xxx.no-ip.com to my ip, so any host lookups for the MX
mail.xxx.no-ip.com will come in at my NAT gateway at port 53 where i
forward it to the server running BIND to resolve them back to just
xxx.no-ip.com so that the host trying to send incoming mail will then come
at port 25 on my NAT and the gateway will forward that to the server
running sendmail.

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