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enter image description hereIf I use my 

geth --identity "MyNodeName" --rpc --rpcport "8545" --rpccorsdomain "*" 
--datadir Users/aydinabadi/TestChain1 --port "30303" --rpcaddr 
"127.0.0.1"  --nodiscover --rpcapi "db,eth,net,web3,personal" -- 
networkid 123 init /Users/xxxx/CustomGenesis.json


 geth --identity "MyNodeName" --rpc --rpcport "8545" --rpccorsdomain 
 "*" --datadir Users/xxxx/TestChain1 --port "30303" --nodiscover -- 
 rpcapi "db,eth,net,web3,personal" --networkid 123 console

Everything works fine. But if I change rpcaddr "127.0.0.1" to a static address like 129.215.199.18 and run the above code, i will get the following warning in geth: 

Failed account unlock attempt            
address=0x621C385fe616fBe096322E71d6f02631d520C1Ca 
err="could not decrypt key with given passphrase"

Note that this is the only account I had. Even if I try to unlock my account once I keep getting the above warning. It also prevents me to deploy the contract to the blockchain if I use remix and metamask. But I will not have any issue if I use rpcaddr "127.0.0.1" in the above command line.

Also, when I send only one transaction via geth, the console keeps saying that a transaction has been submitted.

enter image description here

Question: What is the problem?

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Sure, this is brute-force attack try to unlock account and send out tnx. Never never never open up rpc port public

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