If I creat a ethereum private chain through geth. Is the Ethereum private chain a permissioned blockchain?
Your blockchain is not permissioned, i.e. is uses the same rules as Mainnet. Though, in order to connect to it and use it, one will need to:
- Know IP/port of some of your nodes
- Be able to connect to your nodes
- Have your genesis block (probably it is possible to download it from node)