Create atlas network

how to create atlas network which is my private atlas network of three nodes ?
I have created three blockstack-core nodes
and while configuring them with blockstack-core configure command
i am specifying same host in atlas_seeds
is it enough or there is something else i need to do to make private atlas network because it is also adding other peers in atlas.db which i have not added

Hey @hansraj,

Atlas nodes that run on mainnet will always try and talk to each other – if one node in your cluster manages to contact another node outside your cluster, all of your nodes will eventually learn of it. If you want to keep them completely cut off from the mainnet, you should run them behind a firewall that blocks TCP 6264. Nodes that are either on testnet or follow different consensus rules than mainnet (e.g. a fork) will not talk to each other.