Port 8000 — HTTP alternate

Q: How do I check if port 8000 is open?

Locally, sudo lsof -i :8000 on macOS or Linux, or netstat -ano | findstr :8000 on Windows. From outside, nc -zv host 8000 tells you whether anything answers.

TCP registered

What runs on port 8000

A common development port — Django, Python `http.server`, many others.

A conventional alternative to 80 for anything unprivileged, and the default for Python's http.server and Django's development server. Because it is so commonly used for quick local sharing, it is also commonly forgotten about and left running — a directory listing on 8000 exposed to a network is a small but real information leak.

Security considerations

Development convention only.

Checking whether something is listening

# Linux / macOS — what is bound to the port
sudo lsof -i :8000
sudo ss -lntp | grep :8000

# Windows
netstat -ano | findstr :8000
Get-NetTCPConnection -LocalPort 8000

# is it reachable from outside?
nc -zv example.com 8000
curl -v telnet://example.com:8000

Freeing the port

# find the process, then stop it
sudo lsof -ti :8000 | xargs kill        # Linux / macOS
netstat -ano | findstr :8000            # note the PID, then:
taskkill /PID <pid> /F                    # Windows

Should this port be open to the internet?

Usually not. Expose it only if a specific external client needs it, and restrict by source address where you can.

Opening or blocking port 8000

Finding the port is usually the first half of the job. Start narrow — the second rule is there for services that genuinely serve the public, and most do not:

# ufw — Debian, Ubuntu
sudo ufw allow from 10.0.0.0/8 to any port 8000 proto tcp
sudo ufw allow 8000/tcp                   # only if it genuinely serves the public

# firewalld — RHEL, Fedora, CentOS
sudo firewall-cmd --permanent --add-rich-rule='rule family=ipv4 source address=10.0.0.0/8 port port=8000 protocol=tcp accept'
sudo firewall-cmd --reload

# iptables, if you are still there
sudo iptables -A INPUT -p tcp --dport 8000 -s 10.0.0.0/8 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 8000 -j DROP

# Windows
New-NetFirewallRule -DisplayName "HTTP alternate 8000" -Direction Inbound -Protocol TCP -LocalPort 8000 -RemoteAddress 10.0.0.0/8 -Action Allow

10.0.0.0/8 stands in for a private range — substitute your own. Note that a firewall rule does not undo a service bound to 0.0.0.0; it only stops packets reaching it, and a misconfigured or disabled firewall then exposes it immediately.

Quick reference

Port	8000
Protocol	TCP
Service	HTTP alternate
Range	Registered (1024–49151) — any user process may bind

Frequently asked questions

What is port 8000 used for?

A common development port — Django, Python `http.server`, many others.

Is it safe to open port 8000?

Development convention only.

How do I check if port 8000 is open?

Locally, sudo lsof -i :8000 on macOS or Linux, or netstat -ano | findstr :8000 on Windows. From outside, nc -zv host 8000 tells you whether anything answers.

Why do I get "address already in use" on port 8000?

Another process is bound to it — often a previous run of your own program that did not exit cleanly. Find it with lsof -ti :8000 and stop it, or configure your application to use a different port.

Can I change the port this service uses?

Almost always yes, in the service's configuration. Moving off a default port reduces automated scan noise, but it is obfuscation rather than security — a real attacker scans all 65,535.

Other common ports

All port numbers