MongoDB Auth and TLS on an Anubiz Offshore VPS
Public MongoDB without auth is one of the most-leaked datastores on the internet. Anubiz cloud image does not preinstall Mongo - good. When you do install, the hardening checklist is short but unforgiving: bind to internal IP only, enable auth, enable TLS, define users with least-privilege roles. This guide covers Mongo 7 on Ubuntu 24.04.
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Step 1: Install
MongoDB official repo. apt install mongodb-org. Service masked until configured.
Step 2: Bind Address
/etc/mongod.conf: bindIp: 127.0.0.1,10.0.0.5 (loopback plus internal). Never 0.0.0.0.
Step 3: Auth
Start mongod once, create admin user with db.createUser userAdminAnyDatabase role. Then enable security.authorization: enabled, restart.
Step 4: TLS
net.tls.mode: requireTLS, net.tls.certificateKeyFile. Reuse the VPS CA.
Step 5: Roles
Per-app user with role readWrite scoped to one db. No shared admin connection from app.
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