How to Fix Redis Error: Connection Refused

Quick Answer: Redis connection refused error occurs when the Redis server is not running or not listening on the expected port. Start Redis service, verify connection parameters, and check firewall rules.

What Causes This Error

Redis server not running or stopped
Redis listening on different port than configured
Firewall blocking Redis connection
Incorrect host or port in connection string
Redis authentication credentials wrong
Redis service crashed or failed to start
Network isolation or VPC configuration issue

Step-by-Step Fixes

Fix 1: Start Redis Service

Check if Redis is running: redis-cli ping,If not, start: redis-server,Or: sudo systemctl start redis-server,Verify: redis-cli ping (should return PONG),Test connection

Fix 2: Verify Connection Parameters

Check host in connection string,Verify port number (default 6379),Test with redis-cli: redis-cli -h host -p port,Check for typos,Update connection string if needed

Fix 3: Check Firewall Rules

Verify firewall is not blocking Redis port,Add exception if needed,Or disable firewall temporarily to test,If it works, configure permanent exception,Re-enable firewall

Fix 4: Check Redis Configuration

Open redis.conf,Verify bind address,Check port setting,Verify requirepass if authentication is enabled,Restart Redis with new config

Fix 5: Verify Network Connectivity

Test network: ping host,Test port: telnet host port,Check routing if remote,Verify VPC/security groups if cloud,Test connection again