concept to connect laptop(GPRS) to office desktop (VPN,ssh tunel)

Perhaps some of you can help me to develope
a secure strategy to connect from my laptop
via GPRS to my desktop (with firewall) at home.
Its my laptop *only* that should have permission
to connect through my office firewall.

My firewall-PC simply drops all external connection
from internet ("personal firewall"). Nearly all
ports are closed. Calling my desktop's modem
by ringing a certain number, my desktops dials in
to internet via firewall-PC and rests connected
to internet for 5 min.

Now I want to connect from my Laptop (connected
to Internet by GPRS). Unfortunately GPRS doesn't
allow direct connection to my Office PC. So I
have to go via Internet.

I totally newbie concerning firewall, tunneling, etc.
Any suggestions how to connect to my desktop
easily and with a high level of security?
Tunnelling (ssh)? VPN?
Using a certain code to encrypt that knows my
laptop and my desktop only?
It is possible that my firewallPC sends the
actual IP adress to a certain file to my
internet website aiai.de, e.g. ip.txt after
connecting to internet. My laptop could read
this file and install a ssh-tunel or something
like that.

Please give me pointers where I can start
studying concepts for my aim ...

tia
Ekkard

Ekkard,

I use WebEx Access Anywhere. Then I don't have to worry about
firewall, configuration etc. Install an agent on your work PC and you
can access it from anywhere you can browse the web. It
(http://www.webex.com/go?accessone) is having a promotion that you can
try it for free until 2005.

Hope it helps,
Jason

Ekkard Gerlach <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)>.. .
> Perhaps some of you can help me to develope
> a secure strategy to connect from my laptop
> via GPRS to my desktop (with firewall) at home.
> Its my laptop *only* that should have permission
> to connect through my office firewall.
>
> My firewall-PC simply drops all external connection
> from internet ("personal firewall"). Nearly all
> ports are closed. Calling my desktop's modem
> by ringing a certain number, my desktops dials in
> to internet via firewall-PC and rests connected
> to internet for 5 min.
>
> Now I want to connect from my Laptop (connected
> to Internet by GPRS). Unfortunately GPRS doesn't
> allow direct connection to my Office PC. So I
> have to go via Internet.
>
> I totally newbie concerning firewall, tunneling, etc.
> Any suggestions how to connect to my desktop
> easily and with a high level of security?
> Tunnelling (ssh)? VPN?
> Using a certain code to encrypt that knows my
> laptop and my desktop only?
> It is possible that my firewallPC sends the
> actual IP adress to a certain file to my
> internet website aiai.de, e.g. ip.txt after
> connecting to internet. My laptop could read
> this file and install a ssh-tunel or something
> like that.
>
> Please give me pointers where I can start
> studying concepts for my aim ...
>
> tia
> Ekkard