Tag: Networking
Uptime Kuma: The Ultimate Guide to Self-Hosted Website Monitoring
A step-by-step guide to Uptime Kuma, the free, open-source monitoring tool: install it with Docker, add your first monitors, set up alerts and public status pages, and learn why self-hosted monitoring is worth it.
How to Set Up Tailscale: Access Your Devices and Home Network from Anywhere
A step-by-step beginner's guide to Tailscale: install it on your devices, reach your home network from anywhere with a subnet router, route traffic through an exit node, and keep your tailnet secure.
Learn VPS: From Server Basics to Your First Deployment
New to servers? Learn what a VPS is, how it compares to shared hosting, and how to deploy your first website on one.
What Is an IP Address? IPv4 vs IPv6, Public vs Private
New to networking? Learn what an IP address is, how IPv4 and IPv6 differ, and the difference between public and private addresses.
What Are Binary and Hexadecimal Number Systems?
New to binary and hexadecimal number systems? Learn how they work, how to convert IP addresses, and how hex powers CSS colors.
How to Set Up an SFTP Server on Linux
Step-by-step guide to setting up a secure SFTP server on Linux with OpenSSH, including chroot-jailed users, key-based authentication, and troubleshooting tips.
What Is SSH? A Beginner's Guide to Secure Remote Login with SSH Keys
Learn what SSH is, how it works, and how to set up passwordless SSH login with SSH keys on Linux, macOS, and Windows, including hardening tips and troubleshooting.
Network Protocols for Troubleshooting, Tunneling, and Security
Part 8 of the Computer Networking for Beginners series: learn how ICMP powers ping and network troubleshooting, how GRE builds tunnels, and how IPsec secures VPNs with AH, ESP, IKE phases 1 and 2, and transport vs. tunnel mode.
What Are the Well-Known Port Numbers?
Part 7 of the Computer Networking for Beginners series: confused by TCP/UDP ports? Learn what well-known port numbers are, the port ranges, and a cheat sheet of common ports like 20/21, 22, 25, 53, 80, 443, and 3389 — organized by category, with firewall and security tips.
Internet Protocol Explained: How Data Travels Across Networks
Part 6 of the Computer Networking for Beginners series: learn how data travels across networks with the Internet Protocol — encapsulation explained with a moving-truck analogy, TCP vs. UDP, IP addresses and port numbers, sockets, and well-known vs. ephemeral ports.
Cloud Networking Explained: VPCs, Gateways, Virtualization, and Security
Part 5 of the Computer Networking for Beginners series: learn how networks work in the cloud — elasticity and multi-tenancy, public, private, and hybrid clouds, IaaS, PaaS, and SaaS, the cloud responsibility matrix, network function virtualization, VPCs and subnets, internet and NAT gateways, transit gateways, VPC endpoints, and cloud security with security lists and security groups.
Networking Concepts Explained: CDNs, VPNs, QoS, and TTL
Part 4 of the Computer Networking for Beginners series: learn how content delivery networks (CDNs) speed up websites, how VPNs create secure tunnels, how Quality of Service (QoS) prioritizes traffic, and how Time to Live (TTL) works in IP routing and DNS.
Networking Devices Explained: Routers, Switches, Firewalls, and More
Part 3 of the Computer Networking for Beginners series: learn what routers, switches, firewalls, IDS/IPS, load balancers, proxies, NAS and SAN storage, wireless access points, and wireless LAN controllers do, which OSI layer each works at, and how they fit together.
What Is the OSI Model? The Seven Network Layers
Part 2 of the Computer Networking for Beginners series: learn the 7 layers of the OSI model, from physical to application, how encapsulation works, how to see the layers in a real packet with Wireshark, and why this networking standard still matters today.
Computer Networking: A Complete Guide to How Networks Work
Part 1 of the Computer Networking for Beginners series: learn how computer networks work — devices, types of networks, IP and MAC addresses, ports, TCP and UDP, the OSI and TCP/IP models, DNS, DHCP, what happens when you visit a website, and how to test your own network.
What Is a Subnet? A Beginner's Guide to Subnetting
New to networking? Learn what a subnet is, how subnetting works, IP address classes, and why it matters for hosting and security.
Samba Server: How to Install and Configure on Ubuntu
Step-by-step guide to installing and configuring a Samba server on Ubuntu for cross-platform file sharing with Windows and Mac.
What Is Internet Protocol (IP)? A Beginner's Guide
New to networking? Learn what Internet Protocol (IP) is, how IP packets and headers work, and how IP routing moves data.
Benefits of IT Certifications
Why IT certifications are worth pursuing, what they cost, and where to find free training to prepare for exams like the CCNA.