I've configged ports to map for smtp, http, ftp, pop3 and https.
When telnetting to the router and checking on the router with show ip nat translation, the correct mappings are made.
The telnet session with the machine behind the router is not established however.
Telnetting from the router to the same machine on the correct ports does work.
At first I thought it was a config error, but the ip nat config is working fine on other routers.
I then put the config on a new 878, thinking some hardware problem. That didn't help, so I'm back at thinking it's a config error.
See attached file for logging and ip nat output as well as config.
Many thanks in advance.