Re: Static NAT from cisco 878, but not ping for cisco!
This is an expected behavior. Because you are configuring static NAT for a single external IP address, that address will be mapped (translated) to the internal address you configured and every traffic coming from the outside (internet) will be sent to the internal address.
In order to have internet connectivity on your router as well, you will need to use dynamic overloaded nat (PAT) which is assigning a port for each connection and does not make a 1:1 translation as static. However, in that case you will need to forward ports to your server if you would like them to be accessible from the internet.
Here's an example for overloaded nat:
access-list 1 permit 192.168.2.0 0.0.0.255
ip nat inside source list 1 interface Dialer0 overload
For more information about NAT, visit the following links:
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