# Native Modules This guide describes Angie's native modules, provides configuration examples, lists their directives and parameters, as well as built-in variables. ## Core Module | [Core](https://en.angie.software//angie/docs/configuration/modules/core.md#core) | Management of service files, processes, and other Angie modules. | |------------------------------------------------------------------------------------|--------------------------------------------------------------------| ## HTTP Modules | [HTTP](https://en.angie.software//angie/docs/configuration/modules/http/index.md#http-core) | Core functionality for processing HTTP requests and responses,
managing the HTTP server, connections, and static files. | |----------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------| | [Access](https://en.angie.software//angie/docs/configuration/modules/http/http_access.md#http-access) | Access control based on IP addresses and CIDR ranges. | | [ACME](https://en.angie.software//angie/docs/configuration/modules/http/http_acme.md#http-acme) | Automatic retrieval and renewal of SSL certificates
using the ACME protocol for HTTP servers. | | [Docker](https://en.angie.software//angie/docs/configuration/modules/http/http_docker.md#http-docker) | Dynamic updating of proxied server groups
based on Docker container labels. | | [Addition](https://en.angie.software//angie/docs/configuration/modules/http/http_addition.md#http-addition) | Insertion of a specified snippet before or after the response body. | | [API](https://en.angie.software//angie/docs/configuration/modules/http/http_api.md#http-api) | RESTful HTTP interface for obtaining basic web server information and
statistics in JSON format,
as well as managing groups of proxied servers. | | [Auth Basic](https://en.angie.software//angie/docs/configuration/modules/http/http_auth_basic.md#http-auth-basic) | Basic HTTP authentication for access control
based on username and password. | | [Auth Request](https://en.angie.software//angie/docs/configuration/modules/http/http_auth_request.md#http-auth-request) | Authorization using a subrequest to an external HTTP service. | | [AutoIndex](https://en.angie.software//angie/docs/configuration/modules/http/http_autoindex.md#http-autoindex) | Automatic directory listing without an index file. | | [Browser](https://en.angie.software//angie/docs/configuration/modules/http/http_browser.md#http-browser) (deprecated) | Browser identification based on the `User-Agent` header. | | [Charset](https://en.angie.software//angie/docs/configuration/modules/http/http_charset.md#http-charset) | Configuration and conversion of response encoding. | | [DAV](https://en.angie.software//angie/docs/configuration/modules/http/http_dav.md#http-dav) | File management on the server using the WebDAV protocol. | | [Empty GIF](https://en.angie.software//angie/docs/configuration/modules/http/http_empty_gif.md#http-empty-gif) | Serving a one-pixel transparent GIF. | | [FastCGI](https://en.angie.software//angie/docs/configuration/modules/http/http_fastcgi.md#http-fastcgi) | Proxying requests to a FastCGI server. | | [FLV](https://en.angie.software//angie/docs/configuration/modules/http/http_flv.md#http-flv) | Pseudo-streaming of Flash Video (FLV) files. | | [Geo](https://en.angie.software//angie/docs/configuration/modules/http/http_geo.md#http-geo) | Converting IP addresses into specified variable values. | | [GeoIP](https://en.angie.software//angie/docs/configuration/modules/http/http_geoip.md#http-geoip) | Obtaining IP address data
based on geolocation using MaxMind GeoIP databases. | | [gRPC](https://en.angie.software//angie/docs/configuration/modules/http/http_grpc.md#http-grpc) | Proxying requests to a gRPC server. | | [GunZIP](https://en.angie.software//angie/docs/configuration/modules/http/http_gunzip.md#http-gunzip) | Decompressing GZip-compressed responses for modification and in cases
where the client does not support compression. | | [GZip](https://en.angie.software//angie/docs/configuration/modules/http/http_gzip.md#http-gzip) | Compressing responses using the GZip method to save traffic. | | [GZip Static](https://en.angie.software//angie/docs/configuration/modules/http/http_gzip_static.md#http-gzip-static) | Serving static files pre-compressed using the GZip method. | | [Headers](https://en.angie.software//angie/docs/configuration/modules/http/http_headers.md#http-headers) | Modifying response header fields. | | [HTTP2](https://en.angie.software//angie/docs/configuration/modules/http/http_v2.md#http-v2) | Processing requests using the HTTP/2 protocol. | | [HTTP3](https://en.angie.software//angie/docs/configuration/modules/http/http_v3.md#http-v3) | Processing requests using the HTTP/3 protocol. | | [Image Filter](https://en.angie.software//angie/docs/configuration/modules/http/http_image_filter.md#http-image-filter) ^[1](#id7) | Image transformation. | | [Index](https://en.angie.software//angie/docs/configuration/modules/http/http_index.md#http-index) | Configuration of index files
that serve requests ending with a slash (`/`). | | [Limit Conn](https://en.angie.software//angie/docs/configuration/modules/http/http_limit_conn.md#http-limit-conn) | Limiting the number of concurrent requests (active connections)
for protection against overload. | | [Limit Req](https://en.angie.software//angie/docs/configuration/modules/http/http_limit_req.md#http-limit-req) | Limiting request frequency
for protection against overload and password guessing. | | [Log](https://en.angie.software//angie/docs/configuration/modules/http/http_log.md#http-log) | Configuration of request logs for tracking resource access
for monitoring and analysis purposes. | | [Map](https://en.angie.software//angie/docs/configuration/modules/http/http_map.md#http-map) | Converting variables based on predefined key-value pairs. | | [Metric](https://en.angie.software//angie/docs/configuration/modules/http/http_metric.md#http-metric) | Custom numeric metrics in the real-time statistics API. | | [Memcached](https://en.angie.software//angie/docs/configuration/modules/http/http_memcached.md#http-memcached) | Retrieving responses from a Memcached server. | | [Mirror](https://en.angie.software//angie/docs/configuration/modules/http/http_mirror.md#http-mirror) | Mirroring requests to other servers. | | [MP4](https://en.angie.software//angie/docs/configuration/modules/http/http_mp4.md#http-mp4) | Pseudo-streaming of MP4 files. | | [Perl](https://en.angie.software//angie/docs/configuration/modules/http/http_perl.md#http-perl) ^[1](#id7) | Handlers for extending functionality
by specifying additional logic in the Perl language. | | [Prometheus](https://en.angie.software//angie/docs/configuration/modules/http/http_prometheus.md#http-prometheus) | Server metrics in Prometheus-compatible format
for monitoring and statistics collection. | | [Proxy](https://en.angie.software//angie/docs/configuration/modules/http/http_proxy.md#http-proxy) | Reverse proxying requests to other HTTP servers. | | [Random Index](https://en.angie.software//angie/docs/configuration/modules/http/http_random_index.md#http-random-index) | Random selection of an index file for requests
ending with a slash (`/`). | | [RealIP](https://en.angie.software//angie/docs/configuration/modules/http/http_realip.md#http-realip) | Determining client address and port
when operating behind another proxy server. | | [Referer](https://en.angie.software//angie/docs/configuration/modules/http/http_referer.md#http-referer) | Validation of `Referer` header values. | | [Rewrite](https://en.angie.software//angie/docs/configuration/modules/http/http_rewrite.md#http-rewrite) | Request URI modification, redirects, variable setting,
and conditional configuration selection. | | [SCGI](https://en.angie.software//angie/docs/configuration/modules/http/http_scgi.md#http-scgi) | Proxying requests to an SCGI server. | | [Secure Link](https://en.angie.software//angie/docs/configuration/modules/http/http_secure_link.md#http-secure-link) | Creating secure links with the ability to limit access time. | | [Slice](https://en.angie.software//angie/docs/configuration/modules/http/http_slice.md#http-slice) | Splitting requests into multiple subrequests for individual fragments
for better caching of large responses. | | [Split Clients](https://en.angie.software//angie/docs/configuration/modules/http/http_split_clients.md#http-split-clients) | Creating variables for A/B testing, canary releases, sharding,
and other scenarios requiring proportional group splitting. | | [SSI](https://en.angie.software//angie/docs/configuration/modules/http/http_ssi.md#http-ssi) | Processing SSI (Server Side Includes) commands in responses. | | [SSL](https://en.angie.software//angie/docs/configuration/modules/http/http_ssl.md#http-ssl) | SSL/TLS configuration for processing HTTPS requests. | | [Stub Status](https://en.angie.software//angie/docs/configuration/modules/http/http_stub_status.md#http-stub-status) (deprecated) | Global connection and request counters in text format. | | [Sub](https://en.angie.software//angie/docs/configuration/modules/http/http_sub.md#http-sub) | Search and replace fragments in the response body. | | [Upstream](https://en.angie.software//angie/docs/configuration/modules/http/http_upstream.md#http-upstream) | Configuration of proxied server groups for load balancing. | | [Upstream Probe](https://en.angie.software//angie/docs/configuration/modules/http/http_upstream_probe.md#http-upstream-probe) | Configuration of active health probes
for proxied server groups. | | [UserID](https://en.angie.software//angie/docs/configuration/modules/http/http_userid.md#http-userid) | Issuing and processing cookies with unique client identifiers
for session tracking and analytics. | | [uWSGI](https://en.angie.software//angie/docs/configuration/modules/http/http_uwsgi.md#http-uwsgi) | Proxying requests to a uWSGI server. | | [XSLT](https://en.angie.software//angie/docs/configuration/modules/http/http_xslt.md#http-xslt) ^[1](#id7) | Transforming XML documents using the XSLT language. | ## Stream Modules | [Stream](https://en.angie.software//angie/docs/configuration/modules/stream/index.md#stream-core) | Core stream server functionality
for balancing TCP and UDP protocols at the L4 level. | |-------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------| | [Access](https://en.angie.software//angie/docs/configuration/modules/stream/stream_access.md#stream-access) | Access control based on IP addresses and CIDR ranges. | | [ACME](https://en.angie.software//angie/docs/configuration/modules/stream/stream_acme.md#stream-acme) | Automatic retrieval and renewal of SSL certificates
using the ACME protocol for stream servers. | | [Geo](https://en.angie.software//angie/docs/configuration/modules/stream/stream_geo.md#stream-geo) | Converting IP addresses into specified variable values. | | [GeoIP](https://en.angie.software//angie/docs/configuration/modules/stream/stream_geoip.md#stream-geoip) | Obtaining IP address data
based on geolocation using MaxMind GeoIP databases. | | [Limit Conn](https://en.angie.software//angie/docs/configuration/modules/stream/stream_limit_conn.md#stream-limit-conn) | Limiting the number of concurrent connections
for protection against overload. | | [Log](https://en.angie.software//angie/docs/configuration/modules/stream/stream_log.md#stream-log) | Configuration of session logs for tracking resource access
for monitoring and analysis purposes. | | [Map](https://en.angie.software//angie/docs/configuration/modules/stream/stream_map.md#stream-map) | Converting variables based on predefined key-value pairs. | | [MQTT Preread](https://en.angie.software//angie/docs/configuration/modules/stream/stream_mqtt_preread.md#stream-mqtt-preread) | Reading client identifier and username from MQTT connections
before making load balancing decisions. | | [Pass](https://en.angie.software//angie/docs/configuration/modules/stream/stream_pass.md#stream-pass) | Passing accepted connections
directly to a configured listening socket. | | [Proxy](https://en.angie.software//angie/docs/configuration/modules/stream/stream_proxy.md#stream-proxy) | Configuration of proxying to other servers. | | [RDP Preread](https://en.angie.software//angie/docs/configuration/modules/stream/stream_rdp_preread.md#stream-rdp-preread) | Reading cookies from RDP connections
before making load balancing decisions. | | [RealIP](https://en.angie.software//angie/docs/configuration/modules/stream/stream_realip.md#stream-realip) | Determining client address and port
when operating behind another proxy server. | | [Return](https://en.angie.software//angie/docs/configuration/modules/stream/stream_return.md#stream-return) | Sending a specified value to the client upon connection
without further proxying. | | [Set](https://en.angie.software//angie/docs/configuration/modules/stream/stream_set.md#stream-set) | Setting specified variable values. | | [Split Clients](https://en.angie.software//angie/docs/configuration/modules/stream/stream_split_clients.md#stream-split-clients) | Creating variables for A/B testing, canary releases, sharding,
and other scenarios requiring proportional group splitting. | | [SSL](https://en.angie.software//angie/docs/configuration/modules/stream/stream_ssl.md#stream-ssl) | SSL/TLS and DTLS protocol termination. | | [SSL Preread](https://en.angie.software//angie/docs/configuration/modules/stream/stream_ssl_preread.md#stream-ssl-preread) | Extracting information from `ClientHello` messages without SSL/TLS termination
and before making load balancing decisions. | | [Upstream](https://en.angie.software//angie/docs/configuration/modules/stream/stream_upstream.md#stream-upstream) | Configuration of proxied server groups for load balancing. | | [Upstream Probe](https://en.angie.software//angie/docs/configuration/modules/stream/stream_upstream_probe.md#stream-upstream-probe) | Configuration of active health probes
for proxied server groups. | ## Mail Modules | [Mail](https://en.angie.software//angie/docs/configuration/modules/mail/index.md#mail-core) | Core mail proxy server functionality. | |----------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------| | [Auth HTTP](https://en.angie.software//angie/docs/configuration/modules/mail/mail_auth_http.md#mail-auth-http) | User authentication and server selection for subsequent
proxying using HTTP requests to an external server. | | [IMAP](https://en.angie.software//angie/docs/configuration/modules/mail/mail_imap.md#mail-imap) | IMAP protocol support. | | [POP3](https://en.angie.software//angie/docs/configuration/modules/mail/mail_pop3.md#mail-pop3) | POP3 protocol support. | | [Proxy](https://en.angie.software//angie/docs/configuration/modules/mail/mail_proxy.md#mail-proxy) | Configuration of proxying to other servers. | | [RealIP](https://en.angie.software//angie/docs/configuration/modules/mail/mail_realip.md#mail-realip) | Determining client address and port
when operating behind another proxy server. | | [SMTP](https://en.angie.software//angie/docs/configuration/modules/mail/mail_smtp.md#mail-smtp) | SMTP protocol support. | | [SSL](https://en.angie.software//angie/docs/configuration/modules/mail/mail_ssl.md#mail-ssl) | SSL/TLS and StartTLS protocol support. | ## Google PerfTools Module | [Google PerfTools](https://en.angie.software//angie/docs/configuration/modules/google_perftools.md#google-perftools) | Responsible for integration with the Google Performance Tools library for
application profiling and performance analysis. | |------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------| ## WASM Modules | [WASM](https://en.angie.software//angie/docs/configuration/modules/wasm/index.md#wasm-core) ^[1](#id7) | Core WASM functionality enabling WASM code execution in Angie. | |--------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------| | [WAMR](https://en.angie.software//angie/docs/configuration/modules/wasm/wasm_wamr.md#wasm-wamr) | Integration with
[WebAssembly Micro Runtime](https://github.com/bytecodealliance/wasm-micro-runtime). | | [Wasmtime](https://en.angie.software//angie/docs/configuration/modules/wasm/wasm_wasmtime.md#wasm-wasmtime) | Integration with the [Wasmtime](https://wasmtime.dev/) runtime environment. | ### Footnotes * **[1]** In our builds, these modules are compiled dynamically and installed as [separate packages](https://en.angie.software//angie/docs/installation/index.md#install-packages); for details, see the description of each module.