This is getting complex. Setting up of DYNDNS, openVPN/getting a VPN
router, making vpn client work on Linux, configuration on auto-reconnect
upon disconnection, and troubleshooting... All are not my cup of tea.
Well, I just have to keep learning :)

Thanks for your suggestion! And have a good day ahead!

Jurgen Haan wrote:
> Jer wrote:
>
>> Am I missing out something? Or is this timeout failure caused by
>> possible NAT arrangement on the ISP side? Is there any way to overcome
>> this failure?
>
> It's very likely that there's some way in the ISP infrastructure that
> makes in 1-way.
>
> Try opening a VPN between source and target.
> Laptop as a VPN client and the other machine as a VPN server.
> After that you can connect back to the Laptop through the VPN.
>
> I can see the problem this is causing because it would mean initiating 2
> client-server connections from both sides.
>
> the VPN from laptop to workstation and the SSH from workstation to
> laptop. If you're able to do both, you might aswell be able to sit
> behind the laptop directly.
>
> The only way this would work is when both machines would be up all the time.
>
> -R-