Can I change port 4000 to 4001 and 30333 to 303334 for running testnet node

I have changed port 4000 to 4001 and 30333 to 303334 for running testnet node. But I can not connect to the local node http://myIP:4000/graphql.

Hey @toulevoir, assuming your node is running successfully with the new flags --port 4001 --peering-port 30334, it seems like you haven’t updated your link to the correct port. Please check http://myIP:4001/graphql.

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