I have successfully created a site to site vpn between two Cisco 857 Routers and can ping all available equipment at each end.
Having done this I am still unable to log on to a domain from the other end of the vpn and get a message that the RPC server is unavailable.
I have set the mss value to 1200 on the dialer0 interfaces at both ends to avoid fragemtation issues and have even tried to set Kerberos to use TCP rather than UDP.
I have also tried (without the mss setting) reducing the mtu of the client pc.
None of this has solved the problem.
Many thanks in advance for any assitance.