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Change Default Ports for Common Services (SSH, Nginx, MySQL)
Changing default service ports reduces automated attacks and avoids conflicts when running multiple services on a VPS.
Run Multiple Services on the Same Port Using a Reverse Proxy
A reverse proxy allows multiple services to share the same port by routing incoming requests based on domain or path. This is commonly used with web apps, APIs, and Docker containers on a VPS.
How to Fix Port Already in Use Error on Linux
The port already in use error happens when another process is already listening on the same port. This commonly affects web servers, Docker containers, and application services on a VPS.
How to Block Suspicious Traffic on a VPS Using iptables
Blocking suspicious traffic protects your VPS from brute-force attacks, port scans, and unwanted access attempts.
How to Limit Bandwidth Per Port or IP on Ubuntu 25.04
Limiting bandwidth per IP or port helps prevent abuse, control resource usage, and keep services stable on a VPS.
How to Monitor Network Traffic on a Linux VPS
Monitoring network traffic helps you understand bandwidth usage, detect abuse, and troubleshoot slow connections on a VPS.
How to Check Which Process Is Using a Port in Ubuntu 25
When a port is already in use, services fail to start and return errors like address already in use. Identifying the process holding the port is the fastest fix.
How to Redirect Ports on a Linux Server
Port redirection allows traffic coming to one port to be forwarded to another. This is commonly used for running services on non-standard ports, Docker containers, Node.js apps, or game servers on a VPS.
How to Force Docker to Clean Cache
Docker cache can silently grow and cause disk pressure, slow builds, or unpredictable image behavior. Forcing a cache cleanup is often necessary on long-running VPS setups.