What is the method to retrieve the IP address of the source accessing the MongoDB database?

I'm looking to enhance the security of my database by allowing access requests only from the app server (which runs on backend using node.js and express.js).

However, when I whitelist the IP address of the app server (Azure App Service Linux), the connection breaks. I tried whitelisting the web server as well (frontend React Azure App Service Windows) but it didn't solve the issue.

Interestingly, when I whitelist 0.0.0.0 it works fine. This raises the question: if it's neither the app nor the web making the request, could it be the user? And how can I gather more information about these requests?

Thank you for your input.

node.jsreactjsmongodbexpressazure-web-app-service

Answer №1

Start by configuring your firewall to block all incoming connections from IPs outside of your app server, except for the IP address of your app server and allow access to your database server on port 27017.

Make changes to the /etc/mongod.conf file.

Ensure that the following lines are added below the comment # network interfaces:

net:
  port: 27017
  bindIp: 0.0.0.0

You can verify your setup by installing a MongoDB desktop client such as Robo 3T and whitelisting the IP address of your home/office computer in your server's firewall on port 27017.

To check which IPs are accessing your database, refer back to your /etc/mongod.conf file and locate the section marked # where to write logging data. This is typically found at a path like /var/log/mongodb/mongod.log

You can view your log file in the terminal using the command:

sudo cat /var/log/mongodb/mongod.log

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