round-robin
Barry Margolin
barmar at genuity.net
Thu Nov 8 21:10:31 UTC 2001
In article <9sep6v$ekc at pub3.rc.vix.com>,
Michele Chubirka <chubirka at gwu.edu> wrote:
>Only problem is that stricter Sendmail security will reject the mail if
>forward and reverse records don't match.
If the connection comes from 10.10.10.3 it will resolve to smtp1.gwu.edu,
which resolves to 10.10.10.3 -- it matches. If the connection comes from
10.10.10.4 it will resolve to smtp2.gwu.edu, which resolves to 10.10.10.4
-- another match.
What doesn't match? The extra A records for smtp.gwu.edu will never be
noticed.
>-----Original Message-----
>While the setup he showed will work, I would recommend something like:
>
>$ORIGIN gwu.edu.
>smtp IN A 10.10.10.3
> IN A 10.10.10.4
>smtp1 IN A 10.10.10.3
>smtp2 IN A 10.10.10.4
>
>$ORIGIN 10.10.10.in-addr.arpa.
>3 PTR smtp1.gwu.edu.
>4 PTR smtp2.gwu.edu.
--
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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