InfluxDB
What is Port 8086?
Port 8086 is the default port for InfluxDB's HTTP API, the leading open-source time-series database. InfluxDB is designed for high-write and high-query workloads on time-stamped data — metrics, events, and real-time analytics. Developed by InfluxData, it's part of the TICK stack (Telegraf, InfluxDB, Chronograf, Kapacitor) for monitoring and observability. InfluxDB uses its own query languages — InfluxQL and Flux — and provides a REST API on port 8086 for writing and querying data. It's commonly paired with Grafana for visualization. InfluxDB 2.x includes a built-in web UI, API tokens, and organizations. Time-series databases are essential for monitoring infrastructure, IoT sensor data, financial markets, and application metrics.
Common Uses
- Time-series metric storage and querying
- Infrastructure monitoring data backend
- IoT sensor data collection and analysis
- Application performance metrics storage
Technical Details
Copy-paste commands to check port 8086 (InfluxDB) from your terminal
Test connectivity
nc -zv example.com 8086
curl -v --max-time 5 http://example.com:8086/
telnet example.com 8086
nmap -p 8086 -sV example.com
(echo > /dev/tcp/example.com/8086) 2>/dev/null && echo "open" || echo "closed"
Open port in firewall
sudo ufw allow 8086/tcp
sudo iptables -A INPUT -p tcp --dport 8086 -j ACCEPT
sudo firewall-cmd --permanent --add-port=8086/tcp && sudo firewall-cmd --reload
Security Considerations
Enable authentication in InfluxDB — older versions default to no authentication. Use TLS for all API connections. Implement token-based authentication (InfluxDB 2.x). Restrict access to monitoring infrastructure only. Don't expose InfluxDB to the internet. Monitor for unusual write patterns that could indicate data injection.
Popular Ports Reference
The most commonly used and referenced network ports