We have a 4.11 server that has a token ring nic and an ethernet nic card in it. IPX routes between the cards fine, but I can't get TCP/IP to. I have TCP/IP bound to both cards. I can ping the token ring nic from the token ring network, and the ethernet nic from the ethernet network, but can't get from one network to the other. I have forwarding on. Could this have something to do with subnet masking? The token ring nic has address 18.104.22.168 and the ethernet nic has address 22.214.171.124 The subnet mask for both is 255.255.255.0 I admit that I don't yet understand the concept of subnet masking. BTW these networks are not connected to the internet so you don't have to worry about legal addresses.