I have a Cisco 837 ADSL router set up as a Site-toSite VPn to our Cisco Concentrator. I can ping the router from my laptop from the head office where the Cisco Concentrator is and users on teh LAN where the Cisco 837 is based can ping me and the servers - great, and everything works fine. But if I telnet onto the router and try and ping from there to say my TFTP server or any server/pc it can't? There are no firewalls in between. I can post the config if you want.
I have this problem too.