Mercurial > prosody-modules
view mod_block_registrations/README.md @ 6514:668b1f0a4dc6
mod_c2s_limit_sessions: Fix check when it's the first connection
Creation of the sessions[username] entry happens after the
"pre-resource-bind" event, before the "resource-bind" event.
Thus, for a users first connection, it may not exist.
This led to an 'attempt to index a nil value' error, fixed here.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Wed, 08 Apr 2026 15:56:38 +0200 |
| parents | cdb9c2616c05 |
| children |
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Introduction ============ On a server with public registration it is usually desirable to prevent registration of certain "reserved" accounts, such as "admin". This plugin allows you to reserve individual usernames, or those matching certain patterns. It also allows you to ensure that usernames conform to a certain pattern. Configuration ============= Enable the module as any other: ``` lua modules_enabled = { "block_registrations"; } ``` You can then set some options to configure your desired policy: Option Default Description ------------------------------------ ------------------- ----------------------------------------------------------------------------------------------------------------------------------------------- block_registrations_users *See source code* A list of reserved usernames block_registrations_matching `{ }` A list of [Lua patterns](http://www.lua.org/manual/5.1/manual.html#5.4.1) matching reserved usernames (slower than block_registrations_users) block_registrations_require `nil` A pattern that registered user accounts MUST match to be allowed block_registrations_confusable `true` Block usernames that look similar to the reserved usernames (requires Prosody be built with ICU) block_registrations_length_minimum `1` Block usernames that are shorter than the given length block_registrations_length_maximum `255` Block usernames that are longer than the given length Some examples: ``` lua block_registrations_users = { "admin", "root", "xmpp" } block_registrations_matching = { "master$" -- matches anything ending with master: postmaster, hostmaster, webmaster, etc. } block_registrations_require = "^[a-zA-Z0-9_.-]+$" -- Allow only simple ASCII characters in usernames ``` Compatibility ============= ------ ------- 13.0 Should work (please test) 0.12 Works ------ -------