Port 8086: InfluxDB
Port 8086 is the default HTTP API port for InfluxDB, a time-series database commonly used for metrics and monitoring data. Writes and queries both go through this single HTTP endpoint.
| Port number | 8086 |
|---|---|
| Service | InfluxDB HTTP API |
| Protocol | TCP |
| Category | Databases |
| Default encryption | No |
How do I check whether port 8086 is open?
Port 8086 carries TCP, so a connection either completes its handshake or it does not, which makes the check definitive.
| Question | Command | What to know |
|---|---|---|
| Is it open on a remote host? | nc -vz example.com 8086 | A TCP handshake either completes or it does not, so netcat gives a definitive answer in one line. |
| Same check on Windows | Test-NetConnection example.com -Port 8086 | Built into PowerShell. TcpTestSucceeded in the output is the answer; telnet is not installed by default on modern Windows. |
| What is listening locally? | ss -tlnp | grep ':8086 ' | Lists the process bound to port 8086 on Linux. On macOS use lsof -nP -iTCP:8086 -sTCP:LISTEN, on Windows netstat -ano | findstr :8086 |
Replace example.com with the host you are testing. A blocked port and a port with nothing listening on it look identical from the outside, so if a service should be running, check locally before blaming the firewall.
Frequently asked questions
What is port 8086 used for?
Port 8086 is the default HTTP API port for InfluxDB, a time-series database commonly used for metrics and monitoring data. Writes and queries both go through this single HTTP endpoint.
Is port 8086 TCP or UDP?
Port 8086 (InfluxDB) uses TCP.
Is port 8086 secure?
Port 8086 is not encrypted by default. Where possible, use an encrypted alternative or tunnel it over TLS or a VPN.
Should I open port 8086 on my firewall?
Only if you specifically need InfluxDB. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.