MongoDB
What is Port 27017?
Port 27017 is the default port for MongoDB, one of the most popular NoSQL document databases. MongoDB stores data as flexible, JSON-like BSON documents, making it easy to map to objects in application code. Created by 10gen (now MongoDB Inc.) in 2007, MongoDB supports rich queries, secondary indexes, aggregation pipelines, transactions, and horizontal scaling through sharding. It's widely used for content management, real-time analytics, IoT data, mobile applications, and as a general-purpose database. MongoDB's flexibility and developer-friendly approach have made it the most popular NoSQL database. Cloud offerings include MongoDB Atlas, which provides fully managed clusters across AWS, Azure, and GCP.
Common Uses
- Application database for web and mobile apps
- Content management and e-commerce data
- Real-time analytics and operational data
- IoT data storage and time-series logging
Technical Details
Copy-paste commands to check port 27017 (MongoDB) from your terminal
Test connectivity
nc -zv example.com 27017
curl -v --max-time 5 http://example.com:27017/
telnet example.com 27017
nmap -p 27017 -sV example.com
(echo > /dev/tcp/example.com/27017) 2>/dev/null && echo "open" || echo "closed"
Open port in firewall
sudo ufw allow 27017/tcp
sudo iptables -A INPUT -p tcp --dport 27017 -j ACCEPT
sudo firewall-cmd --permanent --add-port=27017/tcp && sudo firewall-cmd --reload
Security Considerations
MongoDB has been involved in thousands of data breaches due to instances left exposed without authentication. ALWAYS enable authentication (--auth). Create strong admin credentials. Enable TLS/SSL for encrypted connections. Use IP whitelisting and VPC peering in cloud environments. Enable audit logging. Disable legacy MongoDB wire protocol versions. Never expose port 27017 to the internet without authentication.
Popular Ports Reference
The most commonly used and referenced network ports