Port 6379 – Redis Protocol Specification

Technical analysis, security advisories, vulnerability mitigation, and firewall syntax for TCP/UDP port 6379 (Redis).

Port Number 6379

Transport Protocol TCP

Port Range Type Registered (1024-49151)

Default Status Restricted / LAN

Service Description & Architectural Context

In-memory key-value data store and cache engine.

IANA / RFC Designation:

Port 6379 is assigned to Redis under the Internet Assigned Numbers Authority (IANA) service name registry. In enterprise infrastructure and homelab setups, services listening on this port must follow the principle of least privilege.

Security Analysis & Attack Surface Assessment

Redis defaults to no auth. NEVER bind to 0.0.0.0 without requirepass and TLS.

Hardening Recommendations:

Do not expose port 6379 to public WAN interfaces unless authenticated TLS or VPN wrapping is strictly enforced.
Enforce rate-limiting using Fail2ban, CrowdSec, or cloud edge DDoS protection.
Audit active listening sockets locally: ss -tulpn | grep :6379 or netstat -ano | findstr :6379.

Firewall Rule Snippets for Port 6379

UFW (Ubuntu / Debian Linux)

sudo ufw allow 6379/tcp

iptables (Standard Linux Kernel)

sudo iptables -A INPUT -p tcp --dport 6379 -j ACCEPT

Windows PowerShell (Defender Advanced Firewall)

New-NetFirewallRule -DisplayName "Allow Port 6379" -Direction Inbound -LocalPort 6379 -Protocol TCP -Action Allow

Quick Port Jump

Common Sysadmin Ports

Port 22 SSH Port 80 HTTP Port 443 HTTPS Port 3306 MySQL Port 5432 PgSQL Port 6379 Redis