Seems I was wrong to blame the seventh version. Installed 6.3 and the problem remained — the ADSL connection refused to come up. Turned out the card was acting up; after a wipe with alcohol and moving it to a different slot, it started working. Hooray, we have a gateway, two networks — old and new — both running, all systems go! (knock on wood…) Next tasks: a) SSH authentication without a password, using a key b) Sending mail from a different address. This is caused by the fact that the mail setup in the organizational hierarchy is configured in a somewhat odd way, and a local user needs to send mail on behalf of our organization’s address, which is registered on the upstream mail server… something’s off here, but we’ll have to adapt to the existing rules :( c) And the dyndns questions remain. Fortunately, there’s now an extra machine for experiments. Instead of Hamachi I’ll probably try either Kerio or OpenVPN, because Hamachi lags terribly.