I created a private ethereum network with 3 nodes kai i have also created a dapp. How i can connect my dapp with my private network?
Usually dapps interact with the blockchain through an API provider. You can enable the RPC port in one of nodes, or use another node that will it enabled.
For geth you have to add
--rpc --rpcapi="db,eth,net,web3". Then your users can add a custom connection to MetaMask to your RPC provider and they will be able to interact with your dapp.