Built-in Modules

This reference describes native Angie PRO modules, provides configuration examples, lists their directives and parameters, as well as built-in variables.

Core Module

The Core module: internal files, processes, and other Angie PRO modules.

HTTP Modules

The HTTP module: basic HTTP server functionality.

In addition to it, the following modules are available:

Access	Access control based on IPs and CIDR ranges.
ACME	Automatic retrieval of SSL certificates using the ACME protocol.
Addition	Inserts a predefined snippet before or after the response body.
API	RESTful HTTP interface to obtain basic information about the web server and its statistics in JSON format, as well as to manage groups of proxied servers.
Auth Basic	Basic HTTP authentication for access control based on the username and password.
Auth Request	Authorization using a subrequest to an external HTTP service.
AutoIndex	Automatic directory listing without an index file.
Browser (deprecated)	Browser identification based on the User-Agent header.
Charset	Configuration and conversion of response encoding.
DAV	File management on the server using the WebDAV protocol.
Empty GIF	Serves a one-pixel transparent GIF.
FastCGI	Proxying requests to a FastCGI server.
FLV	Pseudo-streaming of Flash Video (FLV) files.
Geo	Conversion of IP addresses into predefined variable values.
GeoIP	Retrieves IP address data using geolocation by MaxMind GeoIP databases.
gRPC	Proxying requests to a gRPC server.
GunZIP	Decompression of compressed GZip responses for modification or in cases where the client does not support compression.
GZip	Compression of responses using the GZip method to save traffic.
GZip Static	Serves static files pre-compressed using the GZip method.
Headers	Modification of response header fields.
HTTP2	Handles requests using the HTTP/2 protocol.
HTTP3	Handles requests using the HTTP/3 protocol.
Image Filter	Image transformation.
Index	Configuration of index files that serve requests with a trailing slash (/).
JS	Handlers to extend functionality by implementing additional logic in njs, a subset of the JavaScript language.
Limit Conn	Limiting the number of concurrent requests (active connections) to protect against overload.
Limit Req	Limiting the request rate to protect against overload and password guessing.
Log	Configuration of request logs to track resource access for monitoring and analysis.
Map	Converts variables based on predefined key-value pairs.
Memcached	Retrieval of responses from a Memcached server.
Mirror	Mirroring requests to other servers.
MP4	Pseudo-streaming of MP4 files.
Perl	Handlers to extend functionality by implementing additional logic in the Perl language.
Prometheus	Server metrics in a Prometheus-compatible format for monitoring and statistics collection.
Proxy	Reverse proxying requests to other HTTP servers.
Random Index	Random selection of an index file for requests with a trailing slash (/).
RealIP	Client address and port identification when running behind another proxy server.
Referer	Referer header value validation.
Rewrite	Conditional URI modification, redirects, variable setting, and configuration selection.
SCGI	Proxying requests to a SCGI server.
Secure Link	Secure link creation with the ability to restrict access time.
Slice	Splitting requests into multiple sub-requests for better caching of large responses.
Split Clients	Creating variables for A/B testing, canary releases, sharding, and other scenarios that require a proportional group split.
SSI	Processing SSI (Server Side Includes) commands in responses.
SSL	SSL/TLS configuration to handle HTTPS requests.
Stub Status (deprecated)	Global connection and request counters in a text-based format.
Sub	Search and replace snippets in server responses.
Upstream	Configures groups of proxied servers for load balancing.
Upstream Probe	Configures health probes for groups of proxied servers.
UserID	Issuing and processing unique client identifier cookies for session tracking and analytics.
uWSGI	Proxying requests to a uWSGI server.
XSLT	XML transformation using XSLT stylesheets.

Streaming Modules

The Stream: basic stream server functionality for balancing TCP and UDP protocols at the L4 level.

In addition to it, the following modules are available:

Access	Access control based on IPs and CIDR ranges.
Geo	Conversion of IP addresses into predefined variable values.
GeoIP	Retrieves IP address data using geolocation by MaxMind GeoIP databases.
JS	Handlers to extend functionality by implementing additional logic in njs, a subset of the JavaScript language.
Limit Conn	Limiting the number of concurrent requests (active connections) to protect against overload.
Log	Configuration of request logs to track resource access for monitoring and analysis.
Map	Converts variables based on predefined key-value pairs.
MQTT Preread	Reads the client identifier and username from an MQTT connection before making a load balancing decision.
Pass	Configures passing accepted connections directly to a configured listening socket.
Proxy	Configures proxying to other servers.
RDP Preread	Reads cookies from an RDP connection before making a load balancing decision.
RealIP	Client address and port identification when running behind another proxy server.
Return	Sends a specified value to the client upon connection without further proxying.
Set	Sets predefined variable values.
Split Clients	Creating variables for A/B testing, canary releases, sharding, and other scenarios that require a proportional group split.
SSL	Terminates SSL/TLS and DTLS protocols.
SSL Preread	Extracts information from the ClientHello message without terminating SSL/TLS and before making a load balancing decision.
Upstream	Configures groups of proxied servers for load balancing.
Upstream Probe	Configures health probes for groups of proxied servers.

Mail Modules

The Mail module: basic mail proxy server functionality.

In addition to it, the following modules are available:

Auth HTTP	User authentication and server selection for subsequent proxying using HTTP requests to an external server.
IMAP	Support for the IMAP protocol.
POP3	Support for the POP3 protocol.
Proxy	Configures proxying to other servers.
RealIP	Client address and port identification when running behind another proxy server.
SMTP	Support for the SMTP protocol.
SSL	Support for the SSL/TLS and StartTLS protocols.

Other Modules

Google PerfTools

Integration with the Google Performance Tools library for application profiling and performance analysis.