Web & Dev
Risk: High
Port 8888 — Jupyter Notebook / Data Science Server
Port 8888 is the default listening port for Jupyter Notebook and JupyterLab interactive Python computational environments.
PORT NUMBER
8888
PROTOCOL
TCP
DEFAULT PROCESS
python, jupyter-lab
FIREWALL TARGET
8888/tcp
Instant Terminal Fixes for Port 8888
macOS & Linux Terminal
1. Check who is listening on port 8888:
jupyter notebook list || sudo lsof -i :88882. Kill process occupying port 8888 (EADDRINUSE fix):
jupyter notebook stop 8888 || kill -9 $(lsof -t -i:8888)3. UFW Firewall Allow rule:
sudo ufw allow from 127.0.0.1 to any port 8888 proto tcpWindows PowerShell (Admin)
1. Check listening port:
Get-NetTCPConnection -LocalPort 88882. Force kill process on port 8888:
Stop-Process -Id (Get-NetTCPConnection -LocalPort 8888).OwningProcess -Force3. Docker Port Forwarding Mapping:
docker run -p 8888:8888 -d jupyter/scipy-notebookCommon Error Encountered
The port 8888 is already in use, trying another port.
Security Advisory & Hardening
Never disable notebook token authentication when running Jupyter on remote servers, as arbitrary code execution is allowed by design in notebooks.
Frequently Asked Questions
Port 8888 Questions & Answers
Common questions regarding default services, kill commands, and firewall configurations.
Port 8888 is commonly used for Jupyter Notebook / Data Science Server. Port 8888 is the default listening port for Jupyter Notebook and JupyterLab interactive Python computational environments.