Clarification on bind result

[Matus UHLAR - fantomas]

On 31.05.10 14:16, rams wrote:
> I have the following zone file:
> 
> $ORIGIN td3497.com.
> 
> @ IN SOA udns1.ultradns.net. ppk.yahoo.com. (
> 2010052610 ; serial
> 10800 ; refresh
> 3600 ; retry
> 2592000 ; expire
> 86400 ; minimum
> )
> 
> cname.chain.td3497.com. 86400 IN CNAME mx.chain.td3497.com.
> mx.chain.td3497.com. 86400 IN MX 34 mx1.chain.td3497.com.
> mx1.chain.td3497.com. 86400 IN MX 34 mx2.chain.td3497.com.
> mx2.chain.td3497.com. 86400 IN MX 34 mx3.chain.td3497.com.
> mx3.chain.td3497.com. 86400 IN A 1.2.3.4

I have already told that this "chain" is not going to work as you expect.

Since none of mx1.chain.td3497.com and mx2.chain.td3497.com. have A records,
the MX records for mx.chain.td3497.com and mx1.chain.td3497.com point to
nonexistent name and they won't work.


> ramesh.td3497.com. 86400 MX 20 .
> ramesh.td3497.com. 86400 MX 20 mx1.

These are broken. While the first is sometimes used to indicate
"ramesh.td3497.com does not receive mail", the latter points to non-existing
"mx1." toplevel domain.

> *cname.td3497.com. 86400 CNAME .*

This is broken, read RF4592 for wildcard definition and usage.

>  td3497.com. 86400 IN NS udns2.ultradns.net.
> 
> td3497.com. 86400 IN NS udns1.ultradns.net.

-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Saving Private Ryan...
Private Ryan exists. Overwrite? (Y/N)