Hi,
did you configure your ODBC connection with @IP or with server name or with FQDN ?
did you have a look at your ipcop firewall log files ?
Which port have been transfert in ipcop ?
Did you make a try putting the server in the Green zone ?
I would guess IPCop guys should better know about the reasons
G.
(I was also surprised seeing "loading 10.0.10.1" in my browser before your Joomla page load, did you cross check your port transfert / dnsmasq configuration ?)