MX and Split DNS
Laurent Verhoest
lolofarwest at my-deja.com
Tue Jul 13 08:00:19 UTC 1999
your mail servers (sendmail I presume) and DNS servers should be
configured like this I guess :
on the firewall :
use a relay pointing at your internal mail server for local delivery
(macro MH in /etc/sendmail.cf).
your firewall should resolve name querying the internal DNS (to get the
right MX)
on the internal :
use a smart host pointing at your firewall for outgoing mail (macro MS
in /etc/sendmail.cf, and you can disable MX lookup by enclosing the name
into brackets : 'MS[gateway]'.
your internal DNs should forward unresolved queries (external ones thus)
to your firewall.
--
Laurent Verhoest.
System administration is like keeping trains on time.
Nobody ever notice the trains, except when they're late.
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