I have two 1800W routers, one in the main office the other at the secondary office. If I VNC or RDP from a PC in the main office to a PC in the secondary through the GRE tunnel I do not see the other screen, the mouse moves okay but no picture. If however, I do the same from the secondary office to the main office it works fine. I have tried changing the access-list, the NAT, everything, but nothing seems to work.
I have the original network still going. It consists of (main) a 2600 and secondary a 1700. To setup the 1800 routers I copied the conf from the originals. The origianl network works fine both ways with both VNC and RDP.
Any help would be greatly appreciated.