Port 6379: Redis
Port 6379 is Redis, an in-memory data store. Older Redis had no auth by default, so an exposed port 6379 is a classic breach vector; bind it to localhost.
| Port number | 6379 |
|---|---|
| Service | Redis key-value store |
| Protocol | TCP |
| Category | Databases |
| Default encryption | No |
How do I check whether port 6379 is open?
Port 6379 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 6379 | 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 6379 | 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 ':6379 ' | Lists the process bound to port 6379 on Linux. On macOS use lsof -nP -iTCP:6379 -sTCP:LISTEN, on Windows netstat -ano | findstr :6379 |
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 6379 used for?
Port 6379 is Redis, an in-memory data store. Older Redis had no auth by default, so an exposed port 6379 is a classic breach vector; bind it to localhost.
Is port 6379 TCP or UDP?
Port 6379 (Redis) uses TCP.
Is port 6379 secure?
Port 6379 is not encrypted by default. Where possible, use an encrypted alternative or tunnel it over TLS or a VPN.
Should I open port 6379 on my firewall?
Only if you specifically need Redis. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.