override one hostname

Krzysztof Chojnowski notch at toltech.nl
Thu Feb 28 12:22:56 UTC 2008


Hello,

we encountered problem with NAT as described in:
http://www.openbsd.org/faq/pf/rdr.html#reflect . In short: there is a
LAN and a firewall that is forwarding external connections to machines
inside our LAN. We have some services (eg. SMTP) that should be
accessible the same way (using the same hostname - mail.example.org)
from inside and outside our LAN. Our firewall fails to redirect packets
from LAN that are addressed to its external IP.
We can't use "split" functionality  as name server for example.org is
located outside and BIND running in our LAN is used only for cache and
local queries.
My idea was to somehow override just the "mail.example.org" hostname on
our internal BIND. All other queries for example.org should be forwarded
to corresponding NS.
Is it possible with BIND? How can we do this? Thanks in advance for any
help.

greetings
Notch



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