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Most corporate environments block port 9000, since we already allow access from port 80 and port 443 just default to https port instead.
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MinIO Client Configuration Files Guide 
In this document we will walk you through the configuration files of MinIO Client.
MinIO Client configuration directory
MinIO Client configurations are stored in file name .mc. It is a hidden file which resides on user's home directory.
This how the structure of the directory looks like:
tree ~/.mc
/home/supernova/.mc
├── config.json
├── session
└── share
2 directories, 5 files
Files and directories
session directory
session directory keeps metadata information of all incomplete upload or mirror. You can run mc session list to list the same.
config.json
config.json is the configuration file for MinIO Client, it gets generated after you install and start MinIO. All the credentials, endpoint information we add via mc config host are stored/modified here.
cat config.json
{
"version": "8",
"hosts": {
"XL": {
"url": "http://127.0.0.1:9000",
"accessKey": "YI7S1CKXB76RGOGT6R8W",
"secretKey": "FJ9PWUVNXGPfiI72WMRFepN3LsFgW3MjsxSALroV",
"api": "S3v4"
},
"fs": {
"url": "http://127.0.0.1:9000",
"accessKey": "YI7S1CKXB76RGOGT6R8W",
"secretKey": "FJ9PWUVNXGPfiI72WMRFepN3LsFgW3MjsxSALroV",
"api": "S3v4"
},
"gcs": {
"url": "https://storage.googleapis.com",
"accessKey": "YOUR-ACCESS-KEY-HERE",
"secretKey": "YOUR-SECRET-KEY-HERE",
"api": "S3v2"
},
"play": {
"url": "https://play.min.io",
"accessKey": "Q3AM3UQ867SPQQA43P2F",
"secretKey": "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG",
"api": "S3v4"
},
"s3": {
"url": "https://s3.amazonaws.com",
"accessKey": "YOUR-ACCESS-KEY-HERE",
"secretKey": "YOUR-SECRET-KEY-HERE",
"api": "S3v4"
}
}
}
version tells the version of the file.
hosts stores authentication credentials which will be used by MinIO Client.
config.json.old
This file keeps previous config file version details.
share directory
share directory keeps metadata information of all upload and download URL for objects which is used by MinIO client mc share command.