Daniel B. Thurman wrote:
> I am trying to get a handle on how to properly
> assign DNS PTR records, given these conditions:
>
> 1) Single machine containing:
> a) DNS Server
> b) Sendmail Server
<snip>
> The problem here is assigning the PTR, since
> only ONE reverse IP address is allowed. In
> the above case, which will it be, ns1.domain.com
> or mx1.domain.com? Discovery led to the last
> "scanned" entry, which is mx1.domain.com
>
> Why is this a potential problem?
> + One that I can think of, is security verification
> such as some programs do a reverse IP check to reduce
> phishing/spamming?
Alternate idea: have both mx1 and ns1 as CNAMEs to the “real” host name,
and put that “real” host name in the reverse DNS.
Don’t forget that you have to have your MX records pointing to that A
record: MX pointing to CNAMEs is Not Allowed.
Hope this helps,
James.
--
E-mail: james@ | A: Because people don’t normally read bottom to top.
aprilcottage.co.uk | Q: Why is top-posting such a bad thing?
| A: Top-posting.
| Q: What is the most annoying thing in e-mail and usenet?
--
users mailing list
users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
