Port 26379 (Redis Sentinel)

Redis Sentinel for monitoring and automatic failover.

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

What port 26379 is used for

Redis Sentinel for monitoring and automatic failover.

Do not expose to the internet. Sentinel can reconfigure your Redis topology; require auth and keep it internal.

Port 26379 is in the registered range and has no IANA assignment. The usage above is unofficial but widespread.

Linux: is anything listening on TCP 26379?

sudo ss -tlnp 'sport = :26379'

Linux / macOS: which process owns the port

sudo lsof -nP -i :26379

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':26379 '

Windows (Command Prompt)

netstat -ano | findstr :26379

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 26379 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 26379

From Windows

Test-NetConnection HOST -Port 26379

ufw

sudo ufw deny 26379/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 26379 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 26379 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 26379' -Direction Inbound -Protocol TCP -LocalPort 26379 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.