Docker Expose Port 288

Expose Port 288 in Docker

docker run -p 288:288 your-image-name
		

This command maps container port 288 to the same port on the host machine.

Dockerfile Example

FROM node:18-alpine
WORKDIR /app
COPY . .
EXPOSE 288
CMD ["npm", "start"]
		

The EXPOSE instruction documents that the container listens on port 288.

EXPOSE vs Publish (-p)

• EXPOSE 288 documents the port inside the container.
• -p 288:288 makes the port accessible from the host.
• Exposed ports are not reachable unless published.

Docker Expose Port 288 Not Working

If Docker expose port 288 is not working, it is usually due to incorrect port publishing, an application not listening on the expected port, or a port conflict on the host machine.

Port 288 Already in Use

The error “port 288 already in use” means another process is already bound to that port on your host system.

# Find process using port 288
lsof -i :288

# OR use a different host port
docker run -p 8080:288 your-image-name
		

• Ensure your app is listening on port 288 inside the container
• Verify the port is published using -p
• Check firewall or network rules
• Avoid conflicts with existing services

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