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Added hint detail in the introduction to TLS doc detailing switch to ALNP as default implementation. Fixes #2087. #2128

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merged 2 commits into from
Oct 30, 2025
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Added hint detail in the introduction to TLS doc detailing switch to ALNP as default implementation. Fixes #2087. #2128

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Added hint detail in the introduction to TLS doc detailing switch to …
eschabell Oct 29, 2025
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Update administration/transport-security.md
eschabell Oct 30, 2025
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7 changes: 7 additions & 0 deletions administration/transport-security.md
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Fluent Bit provides integrated support for Transport Layer Security (TLS) and its predecessor Secure Sockets Layer (SSL). This section refers only to TLS for both implementations.

{% hint style="info" %}

Fluent Bit 4.1.0 introduced the replacement of Next Protocol Negotiation (NPN) with Application Layer Protocol Negotiation (ALPN) as its implementation for TLS.
Both NPN and ALPN are used when client and server are establishing SSL/TLS connections. ALPN avoids an additional round trip because the client list the application layer protocols supported by the client in the client hello message.

{% endhint %}

Both input and output plugins that perform Network I/O can optionally enable TLS and configure the behavior. The following table describes the properties available:

| Property | Description | Default |
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