Streaming Modules

The Core module provides 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.