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I don't think your ISP would give out priate addresses and NAT everything out that's external. Too many things would break. FTP would be a huge problem, as well as the ISP being responsible for stateful connections on their NAT, which would need tons of memory resources on their router.
You probably have a DSL router/modem combo like I have. It has an internal, private IP block to serve out IP addresses VIA DHCP and an external IP address for the internet.
If I were you, I'd either call a different tech or get the specs for your DSL modem online. |