Happ Knowledge Base

The knowledge base is the reference part of the Happ site, separate from the download and first-launch guides. It has five sections.

The glossary explains individual terms: protocols, modes and subscription parameters. The wiki covers broader topics in full, such as the app's architecture, link formats and how a subscription works. How-to gives step-by-step instructions for specific tasks across platforms. Troubleshooting leads from a symptom to a cause and a solution. Compare puts protocols, modes and apps side by side in a table.

In these materials, Happ is a client app on the Xray-core engine: it sets up a connection over the chosen protocol and routes traffic, but it has no servers of its own and does not sell a subscription for access. The difference from a typical VPN service is covered in detail in the article “Happ is a client, not a VPN service”. The frame matters because many wordings in the knowledge base are written from exactly this position.

The sections are meant to be read one after another, but each has its own level of detail.

The glossary is the shortest format: a definition, an example in Happ, and how it differs from similar terms. The wiki is the most detailed: one wiki article draws on several glossary terms at once and adds what a short definition lacks, such as a table, a diagram of connections and background. For example, the article “How Happ works” uses the terms “TUN”, “system proxy” and “routing profile” together rather than separately.

How-to turns understanding into action: each step has an expected result, and platform differences are collected in a separate table or subsection. Troubleshooting is built differently: first a “cause, how to check, what to do” table for the symptom, then the diagnostic steps, then a checklist and a note on when to write to the provider. Compare solves a third task, choosing between options: a table of at least 10 dimensions and the date the data was checked.

For a beginner who has just opened Happ, it makes more sense to start with the wiki: the article What is Happ explains the architecture and the ways to add a server with no prior knowledge. Look up unfamiliar words in the glossary as you read, where the entries are shorter and more specific. It is convenient to solve the first practical task, such as updating a subscription, from a how-to guide after that.

An experienced user who knows the terms and is looking for a specific answer usually needs not an introductory article but an exact page: a parameter definition in the glossary, a comparison table in compare, or a symptom breakdown in troubleshooting. For this kind of reading the order of the sections does not matter. What matters is a link from a search engine or from another page of the site straight to the right material.

The knowledge base does not retell the pages of other sections of the site. It links to them for details.

The exact text of a Happ error and a step-by-step solution for a specific platform are in the errors section; troubleshooting links there when a symptom comes down to a known error. Protocol parameters, such as the address, port and link flags, are covered in detail in the protocols section; the glossary gives only the essence of a term and points there for a configuration example. The first installation and launch of the app on a specific platform is the job of the setup and download sections, not the knowledge base. How Happ behaves on a mobile network, while roaming, at work or on public Wi-Fi is covered by the scenarios in the unstable networks section. The knowledge base links to them when the discussion is about a specific network rather than the app as a whole.