STACKIT Network Load Balancer

STACKIT Network Load Balancer handles high-throughput Layer-4 TCP and UDP traffic balancing.

Service Overview

• High Throughput: Capable of processing millions of raw network requests per second with minimal latency.
• TLS Passthrough: Preserves encrypted traffic streams directly down to backend target instances.
• Flexible Protocols: Supports custom TCP and UDP application protocols.

Technical Details

• Features: Source IP stickiness, active TCP/UDP health checks, public and private network integration.
• Automation: Fully configurable via Terraform Provider, REST API, and STACKIT Portal.

Feature Availability

The values below come from the STACKIT documentation and update themselves.

From the STACKIT docsNLB features › Feature overview & availabilitySource updated 09.07.2026 · copied 05.10.2026

The following table outlines the specific transport layer conditions and core features available within the STACKIT Network Load Balancer (NLB):

Swipe sideways to see the whole table

Feature	API	SDK	Terraform	Portal
Advanced active health checks (HTTP)	Available	Available	WIP	Available
Basic active health checks (TCP/UDP)	Available	Available	Available	Available
Create/delete NLB	Available	Available	Available	Available
Ephemeral IP	Available	Available	Available	Available
Idle timeout configuration	Available	Available	Available	WIP
L4 load balancing (TCP/UDP)	Available	Available	Available	Available
Logs (Loki)	Available	Available	Available	WIP
Manual target security groups	Available	Available	Available	Available
Metrics (Prometheus)	Available	Available	Available	WIP
Plan changes	Available	Available	Available	Available
Private network only deployment	Available	Available	Available	Available
Resource labels	Available	Available	WIP	WIP
Session persistence (source IP)	Available	Available	Available	Available
Source IP access control (ACL)	Available	Available	Available	Available
TCP proxy support	Available	Available	Available	Available
TLS passthrough	Available	Available	Available	Available
Update full NLB	Available	Available	WIP	WIP
Update target pools only	Available	Available	Available	Available

What is this?

This section is copied from the STACKIT docs automatically, several times a day. It cannot be changed here. Changes belong in the STACKIT docs.

Limitations & Constraints

• No Layer-7 Offloading: Lacks HTTP header parsing, URL path routing, or SSL/TLS certificate termination.

STACKIT documentation docs.stackit.cloud STACKIT Network Load Balancer Documentation Open the documentation