smtp server and CNAMEs
kcd at daimlerchrysler.com
Wed Feb 8 17:27:38 UTC 2006
Harry Putnam wrote:
>Setup: Gentoo linux (kernel 2.6.15-r3)
>Using bind/named as simple authoritative home lan server
>I want to start using a home machine running bind as my mailhub as
>well for home lan. It won't be subjected to the rigors of the big
>wild internet but I'd like to have it setup as if it would for the
>I've setup up a CNAME in zone.192.168.0 that looks
> $TTL 1D
> local.net0. IN SOA reader.local.net0. hostmaster (
> 200405191 ; serial
> 8H ; refresh
> 4H ; retry
> 4W ; expire
> 1D ) ; minimum
> local.net0. IN NS reader.local.net0.
> smtp.local.net0. CNAME reader.local.net0.
> ; just in case someone asks for localhost.local.net0
> localhost.local.net0. A 127.0.0.1
>How is that reflected in this zones reverse pointers file? Or is it
>all just handled by the CNAME line? Currently the revers file looks like:
> $TTL 1D
> 0.168.192.in-addr.arpa. IN SOA reader.local.net0. reader.reader.local.net0. (
> 200405190 ; serial
> 28800 ; refresh (8 hours)
> 14400 ; retry (4 hours)
> 2419200 ; expire (4 weeks)
> 86400 ; minimum (1 day)
> ; define the authoritative name server
> 184.108.40.206.in-addr.arpa. IN NS reader.local.net0. reader.reader.local.net0.
> ; our hosts, in numeric order
> 220.127.116.11.192. IN PTR mob2.local.net0.
> 18.104.22.168.192. IN PTR reader.local.net0.
The PTR should point back to a name that owns the corresponding A RR,
not to a CNAME.
Of course, you didn't show any "reader" A RR in the file for your
local.net0 zone, so it's difficult to verify the correctness of your
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