068 | Internet Link Redundancy (for Web Services and Data Centers)

2025-07-30

We conclude our series on communication link redundancy by exploring perhaps the most critical scenario for modern companies: ensuring continuous Internet access for web services, applications, and data centers. If your website, online store, cloud services, or APIs become unreachable to the outside world, the consequences are immediate — lost customers, lost revenue, and reputational damage.

Providing resilience at this level is complex but absolutely essential, requiring deep understanding of network protocols and architectures.

067 | Redundancy of Interoffice Links (Site-to-Site VPN, MPLS, Dark Fiber)

2025-07-29

Redundancy of Interoffice Links (Site-to-Site VPN, MPLS, Dark Fiber)

We’ve already discussed how to ensure reliable connectivity within a single building. Now let’s look at a more complex but equally critical topic: redundancy of communication links between geographically distributed offices or branches. This is crucial for companies where employees across locations need to exchange data, access shared resources (such as a central CRM, file servers, or IP telephony), and work as a unified whole.

066 | Redundancy of Network Links Within a Single Building: Copper, Fiber, and Bonding

2025-07-28

Redundancy of Network Links Within a Single Building: Copper, Fiber, and Bonding

In the previous article, we explained why network link redundancy is not just a luxury but a critical need for ensuring business continuity. Today we’ll focus on the most basic — but no less critical — level: communication between servers and network equipment within a single building, whether it’s a server room, data center, or a regular office.

065 | Why Network Resilience Is Not a Luxury, but a Necessity

2025-07-27

In today’s world, where every aspect of business depends on IT, and downtime is measured not only in lost revenue but also in missed opportunities and reputational damage, connection stability becomes a critically important factor. From email and internal CRMs to online sales and cloud services — all of it requires constant and reliable network access.

This is where network link redundancy comes into play. It’s not just “insurance” — it’s a fundamental part of your business continuity and high availability strategy for your IT infrastructure.

Configuring EoIP Tunnel Between MikroTik and Keenetic: Bridging Networks Over Private IPs

2025-07-17

In the world of networking, there’s often a need to bridge two remote LANs so they behave like a single local network—even when separated by different routers. For MikroTik users, the concept of EoIP (Ethernet over IP) is familiar: it’s a proprietary tunneling protocol that allows creation of a virtual Ethernet interface (Layer 2) over an IP network.

Good news for Keenetic users: since firmware NDMS v2.10, Keenetic routers also support EoIP! This opens up exciting possibilities for advanced network designs.

Case Study: Configuring Port Knocking on MikroTik for Enhanced Security

2025-07-16

In a world where cyberattacks are becoming increasingly sophisticated, protecting remote access to servers and network equipment is of paramount importance. Simply opening ports for SSH, RDP, or web interfaces makes them targets for constant scanning and brute-force attacks.

Today, we’ll explore a powerful yet lesser-known technique that significantly improves the security of your MikroTik (and not only): Port Knocking. It’s not just about “closing ports,” but a smart system that makes your services invisible to most scanners and bots.