Re: network problem: configuration/DNS? cannot access internal machine using our external IP
Dear Jerome,
looks like you have two problems :
First : Ping works - tracroute not
Are using your Wxx and Linx-Boxes same DNS? If yes, try "traceroute -n EXT-IP"
on your Linux boxes. (Ping doesn't a try to get the name for the given
ip-address, but traceroute does - and DNS-timeouts are rather long). You
tried to disable firewall. That didn't help, because it seems not to be the
problem with the different behavior of ping and traceroute on your linux
boxes. You should have all internal machines get any internetnames resolved
into ip-addresses, including xx.dyndns.org!
Now, if all your Workstations and your server should be able to make dns well,
we'll come to next problem :
Looks like your router does not do the portforwarding for pakets coming from
the internal net. Maybe its a router problem, maybe firewall. Try switching
firewall off again. Maybe your router has a "switch" to make him forward
pakets from the inside with destination adress "EXT-IP" back to the inside -
with destination is ip of the server.
To latest notes : i don't think the xx.dyndns.org entry in hosts does do that
much for the machines on your internal network. But try it without. Linux
itself does not need to know the name of EXT-IP to run smooth.
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