Re: Hosts file resolution in local network & dynamic DNS from the inte

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Read inline please.

In news:BD60A37D-4574-45DA-B1B4-BBE6E1B7F9CF@xxxxxxxxxxxxx,
Raoul Hunziker <RaoulHunziker@xxxxxxxxxxxxxxxxxxxxxxxxx> typed:
Hi

My problem concerns routing mail.

When clients are outside the local network, the POP address is a
dynamic resolved address e.g. test.dyndns.org. This connects to the
router which forwards the query through Port Forwarding to the
Exchange server (e.g. 192.168.1.10) on the local network. This all
work fine.

When the laptops are connected to the local network, this fails as the
resolution ends at the router but the port forwarding does not occur.
I want the clients to go directly to the Exchange server (e.g.
192.168.1.10) and have created an entry in the HOSTS file pointing
'test.dyndns.org' to 192.168.1.10. This also works fine.

When this laptop is now again outside the local network, it still
tries to resolve the POP address via the hosts file and fails.

Is there a way that the laptop can try the hosts file and then go to
the dynamic DNS servers to still resolve 'test.dyndns.org' when it
fails in the hosts file, instead of stopping ? I can write a login
script which will rename the hosts file when users are outside the
local network but there must be a more elegant way.

Can I enter a 'test.dyndns.org' value in the DNS server to resolve to
192.168.1.10 ?

Create a forward lookup zone name test.dyndns.org, in that zone, create one
new Host A record, leave the name field blank, give it the Exchange server's
IP address.

--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps

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