SSH from private to public IP: Impossible??

[Konrad Heuer]

On Tue, 5 Oct 2004, Michael Alipio wrote:

> Good Day,
>   I used ssh to log-in remotely from work to my home
> pc which already obtained a temporary ip address from
> my isp, however, I failed to connect. Is it because I
> am ssh'ing using a pc with a private ip? I tried
> pinging my remote pc but no single packet returned..
> I'm thinking that any other service such as ftpd or
> httpd will not work also, though I've not tried it
> yet. I've tried ftp'ing my home pc but using a public
> ip and it worked.. I'm not sure if it will still work
> from a private ip computer.
> Any idea?

What do you mean by private ip? Something like 192.168.x.y? If so, you
can't connect, that's true, if there's not a nat gateway substituting the
private address by its public address in every ip packet.

If you can access web pages from your private ip system, that's probably
because of a proxy server in your network which fetches pages from the
outside if required from within the local network.

Regards

Konrad Heuer
GWDG, Am Fassberg, 37077 Goettingen, Germany, kheuer2 at gwdg.de