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Port 8086 (InfluxDB)

InfluxDB HTTP API and UI.

Registered (user) port, 1024-49151 TCP Databases Do not expose to the internet

What port 8086 is used for

InfluxDB HTTP API and UI.

Security: should port 8086 be open?

Do not expose to the internet. InfluxDB 1.x has authentication off by default. Keep it internal and enable auth.

IANA assignment

Service nameProtoDescriptionAssigneeReference
d-s-n TCP Distributed SCADA Networking Rendezvous Port Gary Hampton -
d-s-n UDP Distributed SCADA Networking Rendezvous Port Gary Hampton -

Registry dates for this port: registered 2008-02-27.

Check what is listening on port 8086

Linux: is anything listening on TCP 8086?
sudo ss -tlnp 'sport = :8086'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8086
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8086 '
Windows (Command Prompt)
netstat -ano | findstr :8086
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8086 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8086
From Windows
Test-NetConnection HOST -Port 8086

Block port 8086 in the firewall

ufw
sudo ufw deny 8086/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8086 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8086 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8086' -Direction Inbound -Protocol TCP -LocalPort 8086 -Action Block

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All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.