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Port 6380 (Redis (second instance / TLS))

Conventionally the second Redis instance on a host, and the TLS port of Azure Cache for Redis.

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

What port 6380 is used for

Conventionally the second Redis instance on a host, and the TLS port of Azure Cache for Redis.

Security: should port 6380 be open?

Do not expose to the internet. Same as 6379.

IANA assignment

Port 6380 is in the registered range and has no IANA assignment. The usage above is unofficial but widespread.

Check what is listening on port 6380

Linux: is anything listening on TCP 6380?
sudo ss -tlnp 'sport = :6380'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6380
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6380 '
Windows (Command Prompt)
netstat -ano | findstr :6380
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6380 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6380
From Windows
Test-NetConnection HOST -Port 6380

Block port 6380 in the firewall

ufw
sudo ufw deny 6380/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6380 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6380 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6380' -Direction Inbound -Protocol TCP -LocalPort 6380 -Action Block

Related ports

6379Redis26379Redis Sentinel6370metaedit-se6382metatude-mds6389clariion-evr016390metaedit-ws

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