Internet-Ethernet and Local Net

[Ioannis]

I am trying to connect a PIC controller with RS232-to-Ethernet adapter to the internet so I could read data from a remote PC.

The set up is as follows:

1. PIC with Serial com.
2. Serial to Ethernet adapter
3. Local Network with 8 port Switch and a DSL Router with 4 ports. My switch is connected to one port of the router.
4. Local PCs
5. Dynamic IP DSL Internet connection.

On the local ethernet everything is OK, naturally. I see all PC's and of course the PIC.
But I cannot acces the PIC over the Internet. I know that dynamic IP prevents this, but have tried with www.dyndns.com to create a virtual domain with no luck.

All I managed was to access my DSL modem from the remote PC which was the expected thing as I can understand.

How can I overcome the DSL router and see what is behind it on my local net?

Thanks,
Ioannis