We currently have two LANs. One is using the 10.10.x.x schema and the other is using 192.168.x.x. The exchange server and AD server and in the 10.10.1.x subnet and we need to gain access from the 192.168.4.x LAN. We have a Cisco 1921 router between the two LANs and the configuration is attached. From the 192.168.4.x side I can ping the 10.10.1.125 address but not any of the servers or workstations in the 10.10.x.x network. Any help would be greatly appreciated.