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2026-09-25
HTTP (HyperText Transfer Protocol) — an application-layer protocol by which a browser, mobile app, or script requests a resource from a server and receives a response. A resource can be an HTML page, an image, JSON from …
Read more2026-09-22
Dropped frames on a stream often occur not because the computer is weak, but because the link is saturated: someone on the network watches 4K video or starts a large upload, and the stream’s outbound traffic begins …
Read more2026-09-22
Simple utilities from previous parts each answer their own question: ping — is there connectivity, traceroute — which path packets take, nc — is the port open. The three tools in this part give a more complete picture: …
Read more2026-09-22
An IP address identifies a host, and a port identifies a specific service on it. A web server usually accepts connections on port 80 (HTTP) and 443 (HTTPS), SSH on 22, databases and mail on their respective ports. A …
Read more2026-09-22
It happens: the computer has an address, the router responds, ping 8.8.8.8 works, but websites in the browser do not open. Most often the cause is DNS — the system that translates domain names into IP addresses. If a …
Read more2026-09-22
When “the internet is not working”, it’s convenient to check from the bottom up: first your own computer and local network, then connectivity to external nodes, then DNS, ports and applications. This …
Read more2026-09-22
OpenVPN — is a reliable and time-tested VPN protocol that allows setting up secure remote access to a local network. MikroTik RouterOS supports OpenVPN in server mode starting from version 6.x (TCP), and from version 7+ …
Read more2026-09-22
MikroTik routers are valued by system administrators for their configuration flexibility. A budget home hAP lite and a corporate router that costs thousands of dollars run the same operating system — RouterOS. This means …
Read more2026-09-22
Sometimes two remote local networks need to be combined so they work as one: devices see each other by MAC addresses and broadcast requests pass through. For this MikroTik has EoIP (Ethernet over IP) — a layer-2 tunnel …
Read more2026-09-22
In the world of Linux and networking technologies, there are many subtle but critically important kernel settings. One such setting is rp_filter. This parameter, often overlooked, plays a key role in network security and …
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